122501

Properties

Appears in sequences

• Primes p such that (p-1) and the period length of 1/p are both squares.at n=31A076516
• a(n) is the largest prime of the form x^2 + 1 <= 2^n.at n=16A083849
• a(n) is the smallest lesser of twin prime p, such that prime(2 + p) - prime(p) = 2n (cf. A096474).at n=41A096475
• Primes of the form 2^a * 5^b * 7^c + 1 for positive a, b, c.at n=17A114992
• Lower twin primes p1 such that p1-1 is a square.at n=14A145824
• Primes of the form p^2 + 2*p + 2 where p is prime.at n=19A157467
• Primes of the form k^3-k^2+1, k>0.at n=21A162292
• Primes of the form 4m^2 + 1 such that the next prime of this form is a record distance away.at n=6A215233
• A239459(n) / n.at n=34A239462
• Numbers k such that (19*10^k + 149)/3 is prime.at n=22A285938
• Prime numbersat n=11523