A069556 Primes in which the k-th digit (counting from the right) is either a nonzero multiple of k or a divisor of k; furthermore the digit 1 is allowed only when k has no other divisors < 10.

2, 3, 5, 7, 23, 29, 41, 43, 47, 61, 67, 83, 89, 347, 349, 367, 383, 389, 641, 643, 647, 661, 683, 929, 941, 947, 967, 983, 2341, 2347, 2381, 2383, 2389, 2621, 2647, 2663, 2683, 2687, 2689, 2927, 2963, 2969, 4327, 4349, 4363, 4621, 4643, 4649, 4663, 4943

Offset: 1

Author

Amarnath Murthy, Mar 22 2002

Keywords

• base
• nonn
• easy

Examples

			The prime 52627 is a member because 7 is a multiple of 1, 2
is a multiple of 2, 6 is a multiple of 3, 2 is a divisor of 4 and 5 is a multiple of 5.
		

Crossrefs

Cf. A008364.

Extensions

Edited by David Wasserman, Nov 03 2005