Largest n-digit prime in which the unit place digit is 1 and the k-th most significant digit is prime (2,3,5,7) if k is prime else is composite (4,6,8,9,0).
A089706
Largest n-digit prime in which the unit place digit is 1 and the k-th most significant digit is prime (2,3,5,7) if k is prime else is composite (4,6,8,9,0).
Terms
- a(0) =71a(1) =751a(2) =9721a(3) =79531a(4) =978521a(5) =7979771a(6) =97979771a(7) =997979371a(8) =9997979371a(9) =79997979521a(10) =979997978551
External references
- oeis: A089706