70687

Properties

Appears in sequences

• Primes of the form 8*k^2 - 1.at n=38A090684
• Numbers k such that k-1 and k+1 are each the product of exactly 7 primes, counted with multiplicity.at n=18A157487
• Numbers k such that 2^(k-1) == 1 + b*k (mod k^2), where b divides k-1.at n=19A186645
• Numbers k such that 2^(k-1) == 1 + b*k (mod k^2), where b divides k - 2^p for some integer p >= 0 and 2^p <= b.at n=44A186884
• Numbers n such that (16^n + 5^n)/21 is prime.at n=8A225397
• Successive prime sums of the squares forming A347333.at n=16A347334
• a(n) = Sum_{k=1..n} (k * floor(n/k))^3.at n=17A356249
• Primes such that the next 10 prime gaps are all distinct.at n=25A372550
• Primes having only {0, 6, 7, 8} as digits.at n=36A386082
• Prime numbersat n=7003