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Mathematics
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Peter
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About

I am specially interested in number theory, in particular very large numbers.

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144
Is there any mathematical reason for this "digit-repetition-show"?
Feb 8, 2017
112
Least prime of the form $38^n+31$
Dec 7, 2013
69
Why does the Newton-Raphson method not converge for some functions?
Aug 27, 2017
58
Difference between a sub graph and induced sub graph.
Nov 9, 2014
58
Can I search for factors of $\ (11!)!+11!+1\ $ efficiently?
Dec 18, 2019
47
Why do I get one extra wrong solution when solving $2-x=-\sqrt{x}$?
Jan 19, 2016
45
Can a number be equal to the sum of the squares of its prime divisors?
Jun 2, 2015
39
Making 400k random choices from 400k samples seems to always end up with 63% distinct choices, why?
Jul 21, 2014
33
Why do we divide Permutations to get to Combinations?
Feb 20, 2019
29
If nine coins are tossed, what is the probability that the number of heads is even?
Mar 4, 2019
Top Meta posts
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What was the reason to change the layout?
17
What was wrong with my post?
12
How to handle repeated poor questions attempting to prove Famous Conjecture
6
Flag helpful, but post still completely visible?
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61
Are there $n$ groups of order $n$ for some $n>1$?
27
How large can the smallest generating set of a group $G$ of order $n$ be?
22
What is the longest known sequence of forced moves leading to a checkmate for one side?
21
What is the theoretical limit for the number of consecutive checks?
15
Is the result in mini-chess known with perfect play?