Abstract:
The main result of this paper is the fact that the fraction of primes p⩽x satisfying the condition that p−1 has a prime divisor q>exp(lnx/lnlnx) and the number of prime divisors of q−1 essentially differ from lnln(x/n), where n=(p−1)/q, tends to zero as x increases.
Citation:
M. A. Cherepnev, “Properties of large prime divisors of numbers of the form p−1”, Mat. Zametki, 80:6 (2006), 920–925; Math. Notes, 80:6 (2006), 863–867