7812499

Properties

Appears in sequences

• Primes of the form 2^r*5^s - 1.at n=30A077313
• Smallest prime p such that 5^n divides p^4 - 1.at n=8A125610
• a(3n) = 3a(3n-1)-3a(3n-2)+2a(3n-3), a(3n+1) = 3a(3n)-3a(3n-1)+2a(3n-2), a(3n+2) = 3a(3n+1)-3a(3n), a(0) = 0, a(1) = 1, a(2) = 2.at n=31A131761
• Smallest odd prime base q such that p^9 divides q^(p-1) - 1, where p = prime(n).at n=2A133859
• Numbers of the form i*5^j-1 (i=1..4, j >= 0).at n=39A181287
• a(n) = 4*5^n-1.at n=9A198763
• Primes of the form 4*k^3 - 1.at n=23A199367
• Prime numbersat n=527951