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Tomas
  • Member for 11 years, 1 month
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72
Is $83^{27} +1 $ a prime number?
Aug 2, 2013
18
Prime numbers in Collatz sequences
Jul 9, 2013
17
Are there an infinite number of prime quadruples of the form $10n + 1$, $10n + 3$, $10n + 7$, $10n + 9$?
Aug 3, 2013
15
How do I test if a number $x$, is a sum of consecutive natural numbers?
Aug 13, 2013
13
Special cases of the Stark-Heegner theorem with simple proofs
Jun 28, 2013
12
Whether the map $x\mapsto x^3$ in a finite field is bijective
Aug 19, 2013
10
Extending the primes
Jul 30, 2013
8
Stirling numbers combinatorial proof: $S(m,n)=\frac 1{n!} \sum_{k=0}^{n} (-1)^k\binom nk (n-k)^m$
Jul 5, 2013
8
Let $f:[0,1]\to[0,1]$ be continuous then $f$ assumes the value $\int_0^1 f^2(t)dt$ somewhere in $[0, 1].$
Jul 17, 2013
7
proof by induction : $n^n \ge 2^{n-1} n!$
Sep 14, 2013
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LWP refuses to connect via HTTPS