17:
53:
At age 15 he began to travel extensively, giving exhibitions in
Germany, Austria and England. Among his most impressive feats, he multiplied 79532853 × 93758479 in 54 seconds. He multiplied two 20-digit numbers in 6 minutes; two 40-digit numbers in 40 minutes; and two 100-digit numbers in 8
61:
These exhibitions however did not earn him enough money, so he tried to find other employments. In 1844 he obtained a position in the
Railway Department of Vienna, but this didn't last long since in 1845 he was reported in Mannheim and in 1846 in Berlin.
161:
185:'s theorems, but gave up the task once he realized that their comprehension was beyond Dase's capabilities. Gauss however was very impressed with his calculating skill, and he recommended that the
79:
42:
He attended schools in
Hamburg from a very early age, but later admitted that his instruction had little influence on him. He used to spend a lot of time playing
58:
commented that someone skilled in calculation could have done the 100-digit calculation in about half that time with pencil and paper.
268:
16:
200:
mentions his calculating abilities. "... he also had an uncanny sense of quantity. That is, he could just
193:
171:
156:{\displaystyle {\frac {\pi }{4}}=\arctan {\frac {1}{2}}+\arctan {\frac {1}{5}}+\arctan {\frac {1}{8}}.}
278:
273:
55:
70:
69:
to 200 decimal places over the course of approximately two months, a record for the time, from the
46:, and suggested that this played a significant role in developing his calculating skills. Dase had
189:
should allow Dase to do mathematical work on a full-time basis, but Dase died shortly thereafter.
197:
36:
253:
220:
178:
167:
204:, how many sheep were in a field, or words in a sentence, and so forth, up to about 30."
262:
21:
201:
227:, in Mathematical Recreations and Essays, Macmillan, New York, chapter 13.
177:
Dase had very little knowledge of mathematical theory. The mathematician
47:
43:
32:
182:
66:
82:
155:
8:
35:– September 11, 1861, Hamburg) was a German
54:hours 45 minutes. The famous mathematician
50:from early childhood throughout his life.
140:
121:
102:
83:
81:
15:
213:
7:
14:
255:– A biography of Zacharias Dase.
1:
174:from 6,000,000 to 9,000,000.
166:He also calculated a 7-digit
29:Johann Martin Zacharias Dase
187:Hamburg Academy of Sciences
181:tried to teach him some of
295:
65:In 1844, Dase calculated
236:Preston, Richard, 2008,
202:'tell', without counting
170:and extended a table of
172:integer factorizations
157:
25:
225:Calculating Prodigies
158:
19:
80:
56:Carl Friedrich Gauss
194:Gödel, Escher, Bach
71:Machin-like formula
20:Zacharias Dase, by
269:Mental calculators
198:Douglas Hofstadter
153:
26:
148:
129:
110:
91:
37:mental calculator
286:
241:
238:Panic in Level 4
234:
228:
221:W. W. Rouse Ball
218:
162:
160:
159:
154:
149:
141:
130:
122:
111:
103:
92:
84:
31:(June 23, 1824,
294:
293:
289:
288:
287:
285:
284:
283:
259:
258:
250:
245:
244:
235:
231:
219:
215:
210:
179:Julius Petersen
168:logarithm table
78:
77:
12:
11:
5:
292:
290:
282:
281:
276:
271:
261:
260:
257:
256:
249:
248:External links
246:
243:
242:
229:
212:
211:
209:
206:
164:
163:
152:
147:
144:
139:
136:
133:
128:
125:
120:
117:
114:
109:
106:
101:
98:
95:
90:
87:
13:
10:
9:
6:
4:
3:
2:
291:
280:
277:
275:
272:
270:
267:
266:
264:
254:
252:
251:
247:
239:
233:
230:
226:
222:
217:
214:
207:
205:
203:
199:
195:
190:
188:
184:
180:
175:
173:
169:
150:
145:
142:
137:
134:
131:
126:
123:
118:
115:
112:
107:
104:
99:
96:
93:
88:
85:
76:
75:
74:
72:
68:
63:
59:
57:
51:
49:
45:
40:
38:
34:
30:
23:
22:Eduard Kaiser
18:
237:
232:
224:
216:
191:
186:
176:
165:
64:
60:
52:
41:
28:
27:
279:1861 deaths
274:1824 births
263:Categories
208:References
192:The book "
138:
119:
100:
86:π
240:, p. 32.
48:epilepsy
44:dominoes
223:(1960)
33:Hamburg
183:Euclid
135:arctan
116:arctan
97:arctan
67:π
24:, 1850
196:" by
265::
73::
39:.
151:.
146:8
143:1
132:+
127:5
124:1
113:+
108:2
105:1
94:=
89:4
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
