- #1
papacy
- 5
- 0
Homework Statement
if p and p+2 are twins prime and p+1 is triangular number, then find all twin primes.
Homework Equations
Tn is a triangular number if Tn=1+2+...+n = n(n+1) / 2
The Attempt at a Solution
p+1 = n(n+1) / 2 because p+1 is a triangular number
p , p+1 , p+2 are terms in succession
p is prime, p+2 is prime so 3 divide p+1 --> 3/p+1
sure the p+1 is even number because is between of two prime
so p+1 has the form 6k
i don't how to continue.. can someone help me??
Last edited: