OFFSET
1,1
COMMENTS
The majority of the decimal expansions of these (probable) primes rise and fall to form a "sawtooth" pattern, e.g. a(3)=97 and saw(3)+97 = 1234565432123456543212345654417. a(1000)=5291. Proof: PFGW Version 1.2.0 for Windows [FFT v23.8] Primality testing (1111120*(-1+10^(10000))/900009)+5291 [N-1/N+1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 2 Running N-1 test using base 3 Running N+1 test using discriminant 11, base 2+sqrt(11) (1111120*(-1+10^(10000))/900009)+5291 is Fermat and Lucas PRP!
CROSSREFS
KEYWORD
nonn
AUTHOR
Jason Earls, Aug 18 2006
STATUS
approved