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A144306 Let a(1) = least prime p such that 18517# + p is = q(1) prime, then a(n+1) = least number such that q(n)*(q(n)+a(n+1))-1 is prime. 0
39317, 225283, 264517, 730843, 1328317 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
All primes certified using open PFGW from Primeform group with q(1)=PRIMO record prime q(5)= ((((18517#+39317) * (18517#+225282)-1) * ((18517#+39317) * (18517#+225282)+264516)-1) * (((18517#+39317) * (18517#+225282)-1) * ((18517#+39317) * (18517#+225282)+264516)+730842)-1) * ((((18517#+39317) * (18517#+225282)-1) * ((18517#+39317) * (18517#+225282)+264516)-1) * (((18517#+39317) * (18517#+225282)-1) * ((18517#+39317) * (18517#+225282)+264516)+730842)+1328316)-1 and has 127885 digits
LINKS
CROSSREFS
Sequence in context: A031667 A196200 A274128 * A234033 A253940 A183833
KEYWORD
hard,nonn
AUTHOR
Pierre CAMI, Sep 17 2008
STATUS
approved

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Last modified June 23 10:38 EDT 2024. Contains 373643 sequences. (Running on oeis4.)