655051

Appears in sequences

• Pentagonal numbers (A000326) that are also brilliant numbers (A078972).at n=29A113941
• Numbers k such that k + googol is a lower twin prime.at n=16A133281
• Semiprimes of the form (4*n + 1)*(6*n + 1) = 24*n^2 + 10*n + 1.at n=22A255584
• Numbers k > 2 such that 3^(k-1) == 1 (mod k) and gcd(k, 2^(k-1)-1) = 1.at n=16A306144
• Composite numbers k == 5, 7 (mod 12) such that 3^((k-1)/2) == -1 (mod k).at n=26A375918