1451521

Properties

Appears in sequences

• Primes of the form 4*k! + 1.at n=4A062538
• Prime numbers arising from Schorn's proof that there are infinitely many primes.at n=19A104189
• Startorial primes.at n=7A110094
• Primes p such that (p+3839)/3840 is also a prime number.at n=25A162141
• a(n) = 4*n! + 1.at n=9A173322
• Smallest prime factor of the n-th highly totient number (A097942(n)) plus 1.at n=41A209195
• Triangle T(n,k) giving the smallest term in "the infinite trunk of factorial beanstalk" (A219666) whose factorial base representation contains n digits (A084558) and the most significant such digit (A099563) is k.at n=39A230428
• a(n) = n*(n+1)!/2 + 1.at n=8A300559
• Primes of the form (k+1)!*k/2 + 1.at n=7A302859
• Triangular array read by rows: T(n,k) = n!*k + 1, n >= 1, 1 <= k <= n.at n=39A362777
• Triangular array read by rows: T(n,k) is the least prime factor of n!*k + 1, n >= 1, 1 <= k <= n.at n=39A362778
• Triangular array read by rows: T(n,k) is the greatest prime factor of n!*k + 1, n >= 1, 1 <= k <= n.at n=39A362779
• Prime numbersat n=110736