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Artin's conjecture on primitive roots

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332: 1134: 929: 1396: 211: 401:(2) = {3, 5, 11, 13, 19, 29, 37, 53, 59, 61, 67, 83, 101, 107, 131, 139, 149, 163, 173, 179, 181, 197, 211, 227, 269, 293, 317, 347, 349, 373, 379, 389, 419, 421, 443, 461, 467, 491, ...}. 861: 1235: 794: 533: 645: 564: 982: 1517: 736: 765: 1160: 700: 1431: 594: 674: 1018: 1180: 1061: 1038: 949: 814: 614: 478: 1717: 391: 341: 195: 1712: 1066: 1545: 1510: 1540: 87:
on September 27, 1927, according to the latter's diary. The conjecture is still unresolved as of 2024. In fact, there is no single value of
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with complex multiplication under the Generalized Riemann Hypothesis, for primes splitting in the relevant imaginary quadratic field.
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Hasse, H (1966). "About the density of prime numbers p, for a given integral number a not equal to 0 of even or odd order mod p".
1707: 1535: 1702: 429: 1627: 1265: 1567: 327:{\displaystyle C_{\mathrm {Artin} }=\prod _{p\ \mathrm {prime} }\left(1-{\frac {1}{p(p-1)}}\right)=0.3739558136\ldots } 27:
This article is about the conjecture of Emil Artin on primitive roots. For the conjecture of Artin on L-functions, see
405:
It has 38 elements smaller than 500 and there are 95 primes smaller than 500. The ratio (which conjecturally tends to
1602: 1676: 1552: 819: 1661: 1607: 1255: 1185: 1587: 354:
does not satisfy the above conditions. In these cases, the conjectural density is always a rational multiple of
443:
proved in 1986 (Corollary 1) that at least one of 2, 3, or 5 is a primitive root modulo infinitely many primes
1666: 1634: 1622: 1651: 1592: 1572: 1557: 1252:, a number that plays the same role in a generalization of Artin's conjecture as Artin's constant plays here 54: 1646: 1577: 1639: 1425: 1612: 1249: 770: 483: 1656: 1617: 619: 538: 447:. He also proved (Corollary 2) that there are at most two primes for which Artin's conjecture fails. 957: 1671: 124: 705: 1582: 1481: 1329: 1260: 421: 185: 69: 741: 440: 425: 1139: 679: 1473: 1411: 1356: 1313: 28: 1325: 572: 1321: 650: 73: 995: 1286: 1165: 1046: 1023: 934: 799: 599: 463: 1696: 1485: 1333: 174: 50: 35: 17: 1416: 84: 58: 992:
Krishnamurty proposed the question how often the period of the decimal expansion
931:. Here we exclude the primes which divide the denominators of the coordinates of 1378: 1317: 80: 65: 1129:{\displaystyle g^{\left({\frac {p-1}{2^{j}}}\right)}\not \equiv 1{\bmod {p}}} 158:) has a positive asymptotic density inside the set of primes. In particular, 1360: 1495: 1347:
D. R. Heath-Brown (March 1986). "Artin's Conjecture for Primitive Roots".
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The claim is that the period of the decimal expansion of a prime in base
435:
Without the generalized Riemann hypothesis, there is no single value of
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to these primes. This conjectural density equals Artin's constant or a
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be an integer that is not a square number and not −1. Write
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Similar conjectural product formulas exist for the density when
1499: 1446: 924:{\displaystyle N(P)\sim C_{E}\left({\frac {x}{\log x}}\right)} 1117: 535:, Lang and Trotter gave a conjecture for rational points on 954:
Gupta and Murty proved the Lang and Trotter conjecture for
386: 336: 190: 377:
for which 2 is a primitive root has the above density
1304:
Hooley, Christopher (1967). "On Artin's conjecture".
1188: 1168: 1142: 1069: 1049: 1026: 998: 960: 937: 869: 822: 802: 773: 744: 708: 682: 653: 622: 602: 575: 541: 486: 466: 214: 1229: 1174: 1154: 1128: 1055: 1032: 1012: 976: 943: 923: 855: 808: 788: 759: 730: 694: 668: 639: 608: 588: 558: 527: 472: 428:for the conjecture, assuming certain cases of the 373:= 2. The conjecture claims that the set of primes 326: 569:Specifically, they said there exists a constant 566:analogous to Artin's primitive root conjecture. 206:, which can be expressed as an infinite product 1379:"Artin's Primitive Root Conjecture – a survey" 1511: 8: 856:{\displaystyle {\bar {E}}(\mathbb {F_{p}} )} 412:) is 38/95 = 2/5 = 0.4. 1430:: CS1 maint: numeric names: authors list ( 1230:{\displaystyle p\equiv 1+2^{j}\mod {2^{j}}} 1518: 1504: 1496: 1415: 1221: 1216: 1215: 1205: 1187: 1167: 1141: 1120: 1116: 1096: 1079: 1074: 1068: 1048: 1025: 1002: 997: 970: 969: 964: 959: 936: 899: 889: 868: 844: 843: 840: 838: 824: 823: 821: 801: 780: 779: 776: 774: 772: 746: 745: 743: 712: 707: 681: 652: 630: 629: 621: 601: 580: 574: 549: 548: 540: 504: 491: 485: 465: 283: 253: 246: 220: 219: 213: 1240:The result was proven by Hasse in 1966. 439:for which Artin's conjecture is proved. 91:for which Artin's conjecture is proved. 1277: 702:) for which the reduction of the point 1423: 384:. The set of such primes is (sequence 1447:"Primitive points on elliptic curves" 1397:"Primitive points on Elliptic Curves" 767:generates the whole set of points in 40:Artin's conjecture on primitive roots 7: 1372: 1370: 1349:The Quarterly Journal of Mathematics 596:for a given point of infinite order 720: 1718:Unsolved problems in number theory 451:Some variations of Artin's problem 266: 263: 260: 257: 254: 233: 230: 227: 224: 221: 198:), this density is independent of 25: 1285:Michon, Gerard P. (2006-06-15). 789:{\displaystyle \mathbb {F_{p}} } 528:{\displaystyle y^{2}=x^{3}+ax+b} 1713:Conjectures about prime numbers 1417:10.1090/S0002-9904-1977-14310-3 1211: 713: 640:{\displaystyle E(\mathbb {Q} )} 559:{\displaystyle E(\mathbb {Q} )} 977:{\displaystyle E/\mathbb {Q} } 879: 873: 850: 835: 829: 751: 724: 714: 663: 657: 634: 626: 616:in the set of rational points 553: 545: 430:generalized Riemann hypothesis 304: 292: 1: 1182:is unique and p is such that 147:. Then the conjecture states 1266:Cyclic number (group theory) 731:{\displaystyle P{\pmod {p}}} 1395:Lang and 2 Trotter (1977). 1256:Brown–Zassenhaus conjecture 143:is a primitive root modulo 135:) the set of prime numbers 79:The conjecture was made by 1734: 760:{\displaystyle {\bar {P}}} 169:Under the conditions that 26: 1531: 1318:10.1515/crll.1967.225.209 1063:is even if and only if 1526:Prime number conjectures 1445:Gupta and Murty (1987). 188:to 1 modulo 4 (sequence 1708:Algebraic number theory 1677:Schinzel's hypothesis H 1155:{\displaystyle j\geq 1} 695:{\displaystyle p\leq x} 450: 57:modulo infinitely many 1703:Analytic number theory 1451:Compositio Mathematica 1231: 1176: 1156: 1130: 1057: 1034: 1014: 978: 945: 925: 857: 810: 790: 761: 732: 696: 670: 641: 610: 590: 560: 529: 474: 328: 1682:Waring's prime number 1470:Mathematische Annalen 1404:Bull. Amer. Math. Soc 1361:10.1093/qmath/37.1.27 1232: 1177: 1157: 1131: 1058: 1035: 1015: 979: 946: 926: 858: 811: 791: 762: 733: 697: 671: 647:such that the number 642: 611: 591: 589:{\displaystyle C_{E}} 561: 530: 475: 329: 18:Artin's constant 1306:J. Reine Angew. Math 1186: 1166: 1140: 1067: 1047: 1024: 996: 958: 935: 867: 820: 800: 771: 742: 706: 680: 669:{\displaystyle N(P)} 651: 620: 600: 573: 539: 484: 464: 212: 42:states that a given 1647:Legendre's constant 1013:{\displaystyle 1/p} 1598:Elliott–Halberstam 1583:Chinese hypothesis 1478:10.1007/BF01361432 1287:"Artin's Constant" 1261:Full reptend prime 1250:Stephens' constant 1227: 1172: 1152: 1126: 1053: 1030: 1010: 974: 941: 921: 853: 806: 786: 757: 728: 692: 666: 637: 606: 586: 556: 525: 470: 460:An elliptic curve 422:Christopher Hooley 369:For example, take 324: 271: 76:multiple thereof. 70:asymptotic density 49:that is neither a 1690: 1689: 1618:Landau's problems 1175:{\displaystyle j} 1102: 1056:{\displaystyle g} 1033:{\displaystyle p} 944:{\displaystyle P} 915: 832: 809:{\displaystyle E} 754: 609:{\displaystyle P} 473:{\displaystyle E} 441:D. R. Heath-Brown 426:conditional proof 308: 252: 242: 68:also ascribes an 16:(Redirected from 1725: 1536:Hardy–Littlewood 1520: 1513: 1506: 1497: 1490: 1489: 1465: 1459: 1458: 1442: 1436: 1435: 1429: 1421: 1419: 1401: 1392: 1386: 1385: 1383: 1374: 1365: 1364: 1344: 1338: 1337: 1312:(225): 209–220. 1301: 1295: 1294: 1282: 1236: 1234: 1233: 1228: 1226: 1225: 1210: 1209: 1181: 1179: 1178: 1173: 1161: 1159: 1158: 1153: 1135: 1133: 1132: 1127: 1125: 1124: 1109: 1108: 1107: 1103: 1101: 1100: 1091: 1080: 1062: 1060: 1059: 1054: 1039: 1037: 1036: 1031: 1019: 1017: 1016: 1011: 1006: 983: 981: 980: 975: 973: 968: 950: 948: 947: 942: 930: 928: 927: 922: 920: 916: 914: 900: 894: 893: 862: 860: 859: 854: 849: 848: 847: 834: 833: 825: 815: 813: 812: 807: 795: 793: 792: 787: 785: 784: 783: 766: 764: 763: 758: 756: 755: 747: 737: 735: 734: 729: 727: 701: 699: 698: 693: 675: 673: 672: 667: 646: 644: 643: 638: 633: 615: 613: 612: 607: 595: 593: 592: 587: 585: 584: 565: 563: 562: 557: 552: 534: 532: 531: 526: 509: 508: 496: 495: 479: 477: 476: 471: 389: 339: 333: 331: 330: 325: 314: 310: 309: 307: 284: 270: 269: 250: 238: 237: 236: 204:Artin's constant 193: 29:Artin L-function 21: 1733: 1732: 1728: 1727: 1726: 1724: 1723: 1722: 1693: 1692: 1691: 1686: 1527: 1524: 1494: 1493: 1467: 1466: 1462: 1444: 1443: 1439: 1422: 1399: 1394: 1393: 1389: 1381: 1377:Moree, Pieter. 1376: 1375: 1368: 1346: 1345: 1341: 1303: 1302: 1298: 1284: 1283: 1279: 1274: 1246: 1217: 1201: 1184: 1183: 1164: 1163: 1138: 1137: 1092: 1081: 1075: 1070: 1065: 1064: 1045: 1044: 1022: 1021: 994: 993: 990: 985: 956: 955: 933: 932: 904: 895: 885: 865: 864: 839: 818: 817: 798: 797: 775: 769: 768: 740: 739: 704: 703: 678: 677: 649: 648: 618: 617: 598: 597: 576: 571: 570: 537: 536: 500: 487: 482: 481: 462: 461: 458: 453: 418: 416:Partial results 411: 385: 383: 367: 360: 335: 288: 276: 272: 215: 210: 209: 189: 183: 123: 113: 97: 32: 23: 22: 15: 12: 11: 5: 1731: 1729: 1721: 1720: 1715: 1710: 1705: 1695: 1694: 1688: 1687: 1685: 1684: 1679: 1674: 1669: 1664: 1659: 1654: 1649: 1644: 1643: 1642: 1637: 1632: 1631: 1630: 1615: 1610: 1605: 1600: 1595: 1590: 1585: 1580: 1575: 1570: 1565: 1560: 1555: 1550: 1549: 1548: 1543: 1532: 1529: 1528: 1525: 1523: 1522: 1515: 1508: 1500: 1492: 1491: 1460: 1437: 1410:(2): 289–292. 1387: 1366: 1339: 1296: 1276: 1275: 1273: 1270: 1269: 1268: 1263: 1258: 1253: 1245: 1242: 1224: 1220: 1214: 1208: 1204: 1200: 1197: 1194: 1191: 1171: 1151: 1148: 1145: 1123: 1119: 1115: 1112: 1106: 1099: 1095: 1090: 1087: 1084: 1078: 1073: 1052: 1029: 1009: 1005: 1001: 989: 986: 972: 967: 963: 953: 940: 919: 913: 910: 907: 903: 898: 892: 888: 884: 881: 878: 875: 872: 863:, is given by 852: 846: 842: 837: 831: 828: 805: 782: 778: 753: 750: 726: 723: 719: 716: 711: 691: 688: 685: 665: 662: 659: 656: 636: 632: 628: 625: 605: 583: 579: 555: 551: 547: 544: 524: 521: 518: 515: 512: 507: 503: 499: 494: 490: 469: 457: 456:Elliptic curve 454: 452: 449: 417: 414: 409: 403: 402: 381: 366: 363: 358: 348: 347: 346: 345: 323: 320: 317: 313: 306: 303: 300: 297: 294: 291: 287: 282: 279: 275: 268: 265: 262: 259: 256: 249: 245: 241: 235: 232: 229: 226: 223: 218: 181: 167: 166:) is infinite. 121: 111: 96: 93: 55:primitive root 24: 14: 13: 10: 9: 6: 4: 3: 2: 1730: 1719: 1716: 1714: 1711: 1709: 1706: 1704: 1701: 1700: 1698: 1683: 1680: 1678: 1675: 1673: 1670: 1668: 1665: 1663: 1660: 1658: 1655: 1653: 1650: 1648: 1645: 1641: 1638: 1636: 1633: 1629: 1626: 1625: 1624: 1621: 1620: 1619: 1616: 1614: 1611: 1609: 1606: 1604: 1603:Firoozbakht's 1601: 1599: 1596: 1594: 1591: 1589: 1586: 1584: 1581: 1579: 1576: 1574: 1571: 1569: 1566: 1564: 1561: 1559: 1556: 1554: 1551: 1547: 1544: 1542: 1539: 1538: 1537: 1534: 1533: 1530: 1521: 1516: 1514: 1509: 1507: 1502: 1501: 1498: 1487: 1483: 1479: 1475: 1471: 1464: 1461: 1456: 1452: 1448: 1441: 1438: 1433: 1427: 1418: 1413: 1409: 1405: 1398: 1391: 1388: 1380: 1373: 1371: 1367: 1362: 1358: 1354: 1350: 1343: 1340: 1335: 1331: 1327: 1323: 1319: 1315: 1311: 1307: 1300: 1297: 1292: 1288: 1281: 1278: 1271: 1267: 1264: 1262: 1259: 1257: 1254: 1251: 1248: 1247: 1243: 1241: 1238: 1222: 1218: 1212: 1206: 1202: 1198: 1195: 1192: 1189: 1169: 1149: 1146: 1143: 1121: 1113: 1110: 1104: 1097: 1093: 1088: 1085: 1082: 1076: 1071: 1050: 1041: 1027: 1007: 1003: 999: 987: 965: 961: 952: 938: 917: 911: 908: 905: 901: 896: 890: 886: 882: 876: 870: 826: 816:, denoted by 803: 748: 721: 717: 709: 689: 686: 683: 660: 654: 623: 603: 581: 577: 567: 542: 522: 519: 516: 513: 510: 505: 501: 497: 492: 488: 467: 455: 448: 446: 442: 438: 433: 431: 427: 423: 415: 413: 408: 400: 397: 396: 395: 393: 388: 380: 376: 372: 364: 362: 357: 353: 343: 338: 321: 318: 315: 311: 301: 298: 295: 289: 285: 280: 277: 273: 247: 243: 239: 216: 208: 207: 205: 201: 197: 192: 187: 180: 176: 175:perfect power 172: 168: 165: 161: 157: 153: 150: 149: 148: 146: 142: 138: 134: 130: 126: 120: 116: 110: 107: =  106: 102: 94: 92: 90: 86: 82: 77: 75: 71: 67: 63: 60: 56: 52: 51:square number 48: 45: 41: 37: 36:number theory 30: 19: 1568:Bateman–Horn 1562: 1469: 1463: 1454: 1450: 1440: 1426:cite journal 1407: 1403: 1390: 1355:(1): 27–38. 1352: 1348: 1342: 1309: 1305: 1299: 1290: 1280: 1239: 1042: 991: 568: 459: 444: 436: 434: 424:published a 419: 406: 404: 398: 378: 374: 370: 368: 355: 351: 349: 319:0.3739558136 203: 199: 178: 170: 163: 159: 155: 151: 144: 140: 136: 132: 128: 127:. Denote by 118: 114: 108: 104: 100: 98: 88: 85:Helmut Hasse 78: 61: 53:nor −1 is a 46: 39: 33: 1662:Oppermann's 1608:Gilbreath's 1578:Bunyakovsky 1020:of a prime 738:denoted by 676:of primes ( 202:and equals 125:square-free 95:Formulation 1697:Categories 1667:Polignac's 1640:Twin prime 1635:Legendre's 1623:Goldbach's 1553:Agoh–Giuga 1291:Numericana 1272:References 988:Even order 334:(sequence 139:such that 81:Emil Artin 66:conjecture 1652:Lemoine's 1593:Dickson's 1573:Brocard's 1558:Andrica's 1486:121171472 1472:: 19–23. 1334:117943829 1193:≡ 1147:≥ 1086:− 1040:is even. 909:⁡ 883:∼ 830:¯ 752:¯ 687:≤ 480:given by 420:In 1967, 322:… 299:− 281:− 244:∏ 186:congruent 177:and that 173:is not a 1657:Mersenne 1588:CramĂ©r's 1457:: 13–44. 1244:See also 1111:≢ 74:rational 1613:Grimm's 1563:Artin's 1326:0207630 390:in the 387:A001122 365:Example 340:in the 337:A005596 194:in the 191:A085397 184:is not 44:integer 1484:  1332:  1324:  1136:where 251:  64:. The 59:primes 1672:PĂłlya 1482:S2CID 1400:(PDF) 1382:(PDF) 1330:S2CID 410:Artin 382:Artin 359:Artin 117:with 1628:weak 1432:link 1310:1967 1162:and 392:OEIS 342:OEIS 196:OEIS 99:Let 1546:2nd 1541:1st 1474:doi 1412:doi 1357:doi 1314:doi 1213:mod 1118:mod 906:log 796:in 718:mod 83:to 34:In 1699:: 1480:. 1455:58 1453:. 1449:. 1428:}} 1424:{{ 1408:83 1406:. 1402:. 1369:^ 1353:37 1351:. 1328:. 1322:MR 1320:. 1308:. 1289:. 1237:. 951:. 432:. 394:) 361:. 344:). 38:, 1519:e 1512:t 1505:v 1488:. 1476:: 1434:) 1420:. 1414:: 1384:. 1363:. 1359:: 1336:. 1316:: 1293:. 1223:j 1219:2 1207:j 1203:2 1199:+ 1196:1 1190:p 1170:j 1150:1 1144:j 1122:p 1114:1 1105:) 1098:j 1094:2 1089:1 1083:p 1077:( 1072:g 1051:g 1028:p 1008:p 1004:/ 1000:1 971:Q 966:/ 962:E 939:P 918:) 912:x 902:x 897:( 891:E 887:C 880:) 877:P 874:( 871:N 851:) 845:p 841:F 836:( 827:E 804:E 781:p 777:F 749:P 725:) 722:p 715:( 710:P 690:x 684:p 664:) 661:P 658:( 655:N 635:) 631:Q 627:( 624:E 604:P 582:E 578:C 554:) 550:Q 546:( 543:E 523:b 520:+ 517:x 514:a 511:+ 506:3 502:x 498:= 493:2 489:y 468:E 445:p 437:a 407:C 399:S 379:C 375:p 371:a 356:C 352:a 316:= 312:) 305:) 302:1 296:p 293:( 290:p 286:1 278:1 274:( 267:e 264:m 261:i 258:r 255:p 248:p 240:= 234:n 231:i 228:t 225:r 222:A 217:C 200:a 182:0 179:a 171:a 164:a 162:( 160:S 156:a 154:( 152:S 145:p 141:a 137:p 133:a 131:( 129:S 122:0 119:a 115:b 112:0 109:a 105:a 101:a 89:a 62:p 47:a 31:. 20:)

Index

Artin's constant
Artin L-function
number theory
integer
square number
primitive root
primes
conjecture
asymptotic density
rational
Emil Artin
Helmut Hasse
square-free
perfect power
congruent
A085397
OEIS
A005596
OEIS
A001122
OEIS
Christopher Hooley
conditional proof
generalized Riemann hypothesis
D. R. Heath-Brown
Stephens' constant
Brown–Zassenhaus conjecture
Full reptend prime
Cyclic number (group theory)
"Artin's Constant"

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