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 Showing results 1 to 4 of 4 Search took 0.01 seconds. Search: Posts Made By: sweety439
 Forum: sweety439 2022-02-05, 14:21 Replies: 3 Views: 1,503 Posted By sweety439 Notable factorization of Phi(n,2) n (Phi(n,2) is (2*n+1) * prime) Phi(2*n,2) Phi(4*n L,2) & Phi(4*n M,2) Phi(8*n,2) 11 (23 * prime) prime both prime composite (divisible by 353) 23 (47 * prime) prime both...
 Forum: sweety439 2020-10-25, 09:39 Replies: 3 Views: 1,503 Posted By sweety439 * If p is larger, then Rp(b) is harder to be... * If p is larger, then Rp(b) is harder to be prime, the smallest base b such that Rp(b) is prime is about gamma*p (gamma is the Euler constant 0.577215664901...) In general .... (let Rp(b) =...
 Forum: sweety439 2020-10-17, 09:38 Replies: 3 Views: 1,503 Posted By sweety439 M5 = 31, M7 = 127, W5 = 11, W7 = 43 It is... M5 = 31, M7 = 127, W5 = 11, W7 = 43 It is known that MM5, MM7, WW5, WW7 are primes However, MMM5 and WWW5 are both known to be composite Two open problems: Is MMM7 prime? Is WWW7 prime? I...
 Forum: sweety439 2020-10-17, 06:55 Replies: 3 Views: 1,503 Posted By sweety439 Some notable smallest repunit/nexus prime Let a(b) = Smallest prime p such that the generalized repunit number (b^p-1)/(b-1) is prime b(p) = Smallest base b such that the generalized repunit number (b^p-1)/(b-1) is prime c(b) = Smallest...
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