2554843

Properties

Appears in sequences

• Riesel numbers n (n*2^k-1 is composite for all k>0, n odd) that have a covering set.at n=20A101036
• Prime Riesel numbers: primes p such that p*2^k - 1 is composite for all positive integers k.at n=3A182296
• Odd integers n such that for every integer k>0, n*2^k-1 has a divisor in the set {3, 5, 7, 13, 17, 241}.at n=12A244070
• Prime Riesel numbers p that are not Mersenne primes such that 2*p is a noncototient.at n=1A263958
• Prime numbersat n=186794