Keith Backman

 7 How To solve This Perfect Square Word Problem 6 Does it follow from Gödel's theorem that this world cannot be fully described by math? 4 Are there any 2 primitive pythagorean triples who share a common leg? 4 Suppose $p$ and $p-2$ are both prime numbers where $p>5$. Prove $6$ divides $p-1$. 3 A 3 digit number abc, $N=b(10c+b)$ where $b$ and $(10c+b)$ are primes.

### Reputation (1,635)

 +15 Closed form for totient related product +25 What is the largest prime factor of $\tau (20!)$ +30 A 3 digit number abc, $N=b(10c+b)$ where $b$ and $(10c+b)$ are primes. +10 Does digit $6$ always lead to $\ 25921=161^2\$?

### Questions (24)

 28 A different way of thinking of numbers [duplicate] 6 Occurence of numbers not divisible by primes 5 Is there an algorithm for finding squares with a given difference? 4 Euler's totient function applied to higher power triples 4 More on Goldbach

### Tags (67)

 41 elementary-number-theory × 56 9 divisibility × 9 38 number-theory × 59 8 pythagorean-triples × 6 24 prime-numbers × 30 6 soft-question × 3 13 algebra-precalculus × 6 6 incompleteness 10 square-numbers × 7 6 philosophy

### Account (1)

 Mathematics 1,635 rep 1912