658349

Properties

Appears in sequences

• Primes that remain prime through 4 iterations of function f(x) = 2x + 1.at n=24A023302
• Primes that remain prime through 4 iterations of function f(x) = 8x + 7.at n=18A023322
• Initial (unsafe) primes of Cunningham chains of first type with length exactly 5. Primes in A059453 that survive as primes just four "2p+1 iterations", forming chains of exactly 5 terms.at n=17A059764
• Numbers n such that n, 2n+1, 3n+2, 4n+3, 5n+4 are primes.at n=18A067258
• Numbers n such that n, 2n+1, 3n+2, 4n+3, 5n+4, 6n+5 are primes.at n=3A101767
• Primes p such that 2p+1, 4p+3, 6p+5, 8p+7 are all primes.at n=22A107021
• Numbers n such that n, 2*n+1, 3*n+2, 4*n+3, 5*n+4 and 6*n+7 are primes.at n=5A174591
• Sophie Germain primes that are also highly cototient numbers.at n=31A209194
• Prime numbersat n=53441