1,1

1009 and 9973 are the smallest and the largest of four digit primes.

If n=14, then 1009*n - 9973 = 4153 (prime).

If n=128, then 1009*n - 9973 = 119179 (prime).

Cf. A105680, A105710.

Sequence in context: A020905 A048635 A114872 this_sequence A111455 A046290 A111743

Adjacent sequences: A106696 A106697 A106698 this_sequence A106700 A106701 A106702

nonn

Parthasarathy Nambi (PachaNambi(AT)yahoo.com), May 13 2005