Twin prime

A twin prime pair is a pair of prime numbers spaced apart by 2. A twin prime is a member of such a pair.

Examples

The first ten pairs are:

• 3 and 5
• 5 and 7
• 11 and 13
• 17 and 19
• 29 and 31
• 41 and 43
• 59 and 61
• 71 and 73
• 101 and 103
• 107 and 109