27697

Properties

Appears in sequences

• Numbers needed to generate all other natural numbers, only allowing multiplication and addition. Each number can be used only once.at n=9A086424
• Smaller member of a pair (p,q) of cousin primes such that p and q are in different centuries.at n=27A160440
• Primes p such that 2*p^5-+3 are also prime.at n=7A174368
• Smallest prime starting a sequence of 4 consecutive odd primes such that the center of the symmetrical gaps is 2n.at n=15A263171
• a(n) is the number of ways to express 2*n+1 as a sum of parts x such that x+2 is an odd prime.at n=45A333615
• Smaller term p1 of the first of two consecutive cousin prime pairs (p1,p1+4) and (p2,p2+4) such that the distance (p2-p1) is a square.at n=25A339084
• Lesser of cousin happy primes.at n=9A387896
• Prime numbersat n=3021