# What is name of conjecture? [duplicate]

Possible Duplicate:
Every even integer can be expressed as the difference of two primes?

there is one conjecture that I do not know what they are called. This is:

Every even number can be always written as the difference between two prime numbers. Could you please help me to know what it is called?

Regards,

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## marked as duplicate by Graphth, Chris Eagle, Arkamis, ncmathsadist, tomaszNov 1 '12 at 22:08

Do you mean difference of two prime numbers or sum of two prime numbers. –  Graphth Nov 1 '12 at 19:44
Answered in the comments here: mathoverflow.net/questions/111196/… –  Dejan Govc Nov 1 '12 at 20:13

Polignac's conjecture is what you want. It goes further, stating that there are infinately many prime gaps of size $n$ for every even integer $n$.

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