25447

Properties

Appears in sequences

• Primes p from A031924 such that A052180(primepi(p)) = 31.at n=7A052237
• Initial term in sequence of four consecutive primes whose consecutive differences have d-pattern = [6, 4, 6]; short d-string notation for pattern = [646].at n=32A078856
• Primes p such that the differences between the 5 consecutive primes starting with p are (6,4,6,6).at n=8A078964
• a(n) is the first term that can be reduced in n steps via repeated interpretation of a(n) as a base b+1 number where b is the largest digit of a(n), such that b is always 7 so that each interpretation is base 8. Terms already fully reduced (i.e., single digits) are excluded.at n=6A141841
• Primes p such that 8*p^2-2*p-1 divides Fibonacci(p).at n=22A159231
• Primes that are the average of the members of emirp pairs.at n=23A178581
• Nonpalindromic primes that are the average of the members of emirp pairs.at n=15A178585
• Primes that are the average of the members of more than one emirp pair.at n=4A178587
• Smallest prime that is the average of the members of exactly n emirp pairs.at n=3A178589
• Absolute discriminants of complex quadratic fields with 3-class group of elementary abelian type (3,3) of rank 2.at n=25A242863
• Absolute discriminants of complex quadratic fields with 3-class group of type (3,3), 3-principalization type (4443), IPAD [(3,3,3)^3, (3,9)], and Hilbert 3-class field tower of unknown length at least 3.at n=3A242873
• Primes p such that 2*p^2 + 3 and 2*p^2 + 5 are also primes.at n=24A247197
• Absolute discriminants of complex quadratic fields with 3-class group of type (3,3) whose second 3-class group is located on the sporadic part of the coclass graph G(3,2) outside of coclass trees.at n=15A247691
• Compressed discriminator of the factorial numbers.at n=32A272649
• Primes p such that (2^p-2)/p - 1 is prime.at n=4A344361
• Primes having only {2, 4, 5, 7} as digits.at n=40A386153
• Prime numbersat n=2805