Find the sum of all primes q<1000 such that for some prime p<q...

The sum of two primes is 60. What are the numbers?

Find all primes less than 100 that can each be written in all three ways: p=a^2+b^2=c^2+2 e^2=f^2+3...

How do you find the primes denote derivatives with respect to x. Such as xy'+ 5y= 7x^2, y(2)= 5

Find the sum of all primes a<1000, such that a^k +1 = b^{m+1} for some positive integers k,b,m.

Find the sum of all primes p, such that p divides up, where up is the p-th Fibonacci number.

Find the sum of all primes p, such that p divides up, where up is the p- th Fibonacci number. pl...

Find the sum of all primes p, such that p divides u(p), where u(p) is the p-th Fibonacci number....

Let A be the set of primes less than 6 and B be the set of positive odd numbers less than 6. How...

Find the sum of primes p such that p²+11 has exactly six different positive divisors (including 1 an...

If p and q are different primes (so each > or = 2) and if n= pq, then the number of integers of the...

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