A049584 Primes p such that x^52 = 2 has a solution mod p.

2, 7, 23, 31, 47, 71, 73, 89, 103, 113, 127, 151, 167, 191, 199, 223, 233, 239, 257, 263, 271, 281, 311, 337, 353, 359, 367, 383, 431, 439, 463, 479, 487, 503, 577, 593, 601, 607, 617, 631, 647, 719, 727, 743, 751, 823, 839, 863, 881, 887, 919, 967, 983, 991