1. Three new Mersenne primes and a statistical theory;Gillies, Donald B.;Math. Comp.,1964
2. J. R. Ehrman, "Prime divisors of Mersenne numbers," TN–66–40, Stanford Linear Accelerator Center, Stanford, Calif.
3. Divisors of Mersenne numbers 10,000<𝑝<15,000;Kravitz, Sidney;Math. Comp.,1961
4. Review No. 113, Math. Comp., v. 19, 1965, p. 686.