List questions from project-euler

Published on 18 Jun 2012 - 17:38

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How to find large prime factors without using computer?

Published on 22 Jun 2012 - 9:48

598

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Steps to get Inverse of Pentagonal

Published on 29 Jun 2012 - 17:24

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Primality and repeated digits

Published on 04 Jul 2012 - 22:52

134

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Compute $\sum_0^{n-1}2^i11^{n-i-1}\bmod10^9$ when $n=13^{17}$

Published on 05 Jul 2012 - 14:34

417

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Algorithm for generating an ordered list of pair products

Published on 10 Jul 2012 - 11:04

5.4k

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The longest sum of consecutive primes that add to a prime less than 1,000,000

Published on 26 Jul 2012 - 16:59

436

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Identifying which "plain text" is in English

Published on 09 Aug 2012 - 21:35

444

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Solving $\phi (n) < (n-1) \cdot \frac{15499}{94744} $

Published on 11 Aug 2012 - 13:04

729

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Solving $x^2 \cdot y^2 + x^2 + y^2 = c^2$ with $x$, $y$, $c \in \mathbb{Z}^+$

Published on 15 Aug 2012 - 11:39

1.9k

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How many integer solutions to a diophantine equation

Published on 18 Aug 2012 - 6:14

3.6k

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10 most significant digits of the sum of a 100 50-digit numbers

Published on 19 Aug 2012 - 20:49

27.7k

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Find the largest prime factor

Published on 26 Aug 2012 - 11:22

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Every odd composite $=$ prime ${}+ 2x^2$

Published on 29 Aug 2012 - 21:28

1k

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Searching for pandigital numbers

Published on 13 Sep 2012 - 20:18

List Question

sum of even-valued and odd-valued Fibonacci numbers

How to find large prime factors without using computer?

Steps to get Inverse of Pentagonal

Primality and repeated digits

Compute $\sum_0^{n-1}2^i11^{n-i-1}\bmod10^9$ when $n=13^{17}$

Algorithm for generating an ordered list of pair products

The longest sum of consecutive primes that add to a prime less than 1,000,000

Identifying which "plain text" is in English

Solving $\phi (n) < (n-1) \cdot \frac{15499}{94744} $

Solving $x^2 \cdot y^2 + x^2 + y^2 = c^2$ with $x$, $y$, $c \in \mathbb{Z}^+$

How many integer solutions to a diophantine equation

10 most significant digits of the sum of a 100 50-digit numbers

Find the largest prime factor

Every odd composite $=$ prime ${}+ 2x^2$

Searching for pandigital numbers

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