A246045 Biprimatic permutable primes: prime numbers whose digits can be rearranged to form exactly one other prime number. No leading zeros allowed.
13, 17, 31, 37, 71, 73, 79, 97, 107, 127, 139, 181, 191, 193, 239, 241, 251, 271, 277, 281, 283, 293, 313, 331, 347, 349, 367, 421, 439, 457, 461, 463, 467, 479, 521, 547, 563, 569, 577, 587, 619, 641, 643, 647, 653, 659, 673, 683, 691, 701, 709, 727, 743, 757, 769, 787, 797, 811, 821, 823, 857, 863, 877, 907, 911, 947, 967
Offset: 1
Examples
709 -> 079 (forbidden), 097 (forbidden), 709 (prime), 790 (even), 907 (prime), 970 (even) -> conclusion: Two primes.
Links
- Andreas Boe, Table of n, a(n) for n = 1..828
Comments