Unsafe primes (primes in A059456) for which there is exactly one divisor d of p - 1 such that o(d) = L(p), where o(k) is the multiplicative order of k modulo p and L(p) is the least common multiple of o(k)'s among all divisors k of p - 1.

A347332

Unsafe primes (primes in A059456) for which there is exactly one divisor d of p - 1 such that o(d) = L(p), where o(k) is the multiplicative order of k modulo p and L(p) is the least common multiple of o(k)'s among all divisors k of p - 1.