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 Showing results 1 to 25 of 1000 Search took 0.27 seconds. Search: Posts Made By: sweety439
 Forum: Homework Help 2022-05-25, 05:33 Replies: 3 Views: 320 Posted By sweety439 Because for all such primes p, 2^p-1 is divisible... Because for all such primes p, 2^p-1 is divisible by 2*p+1, since 2*p+1 is == 7 mod 8, thus 2 is a quadratic residue (https://en.wikipedia.org/wiki/Quadratic_residue) mod 2*p+1, and...
 Forum: FactorDB 2022-05-22, 23:13 Replies: 545 Views: 101,459 Posted By sweety439 P-1... P-1 (https://en.wikipedia.org/wiki/Pollard%27s_p_%E2%88%92_1_algorithm) and P+1 (https://en.wikipedia.org/wiki/Williams%27s_p_%2B_1_algorithm) are "integer factoring" algorithm N-1...
 2022-05-22, 23:00 Replies: 129 Views: 32,935 Posted By sweety439 = = Are you sure that Primo can handle this large... = = Are you sure that Primo can handle this large prime? Recently, the limit of Primo just extended from 40000 digits to 50000 digits, to make you can use Primo to prove R49081 Suggest you to...
 Forum: sweety439 2022-05-22, 08:51 Replies: 417 Views: 33,598 Posted By sweety439 No, X1X1 (base 12) = 17545 (base 10), it is hard... No, X1X1 (base 12) = 17545 (base 10), it is hard to find a positive multiple of 17545 which is palindromic number in base 12 (A029957 (https://oeis.org/A029957))
 Forum: sweety439 2022-05-21, 23:14 Replies: 417 Views: 33,598 Posted By sweety439 Smallest k such that n*k is palindromic in... Smallest k such that n*k is palindromic in dozenal (all n and k are written in dozenal) Next term (n=X1X1) is very large, such number
 Forum: sweety439 2022-05-21, 08:46 Replies: 35 Views: 1,811 Posted By sweety439 Can you prove the primality of these PRPs which... Can you prove the primality of these PRPs which are in order to prove the Riesel...
 Forum: sweety439 2022-05-21, 08:14 Replies: 35 Views: 1,811 Posted By sweety439 When will 8*13^32020+183... When will 8*13^32020+183 (http://factordb.com/index.php?id=1100000000490878060) (the largest minimal prime (https://primes.utm.edu/glossary/xpage/MinimalPrime.html) in base 13, see...
 Forum: FactorDB 2022-05-21, 07:34 Replies: 545 Views: 101,459 Posted By sweety439 Not delete the modulo operator (%), but just fix... Not delete the modulo operator (%), but just fix this operator, also suggest lower case letters for variables, upper case letters for these functions: (delete these operators: "!!" = double factorial...
 Forum: sweety439 2022-05-20, 22:20 Replies: 2 Views: 144 Posted By sweety439 A085398 (https://oeis.org/A085398)(n) is much... A085398 (https://oeis.org/A085398)(n) is much large than all A085398 (https://oeis.org/A085398)(k) for all k<=n for: * n=115, and if skip n=115, then n=119 (just larger than 115) is such n *...
 Forum: sweety439 2022-05-19, 20:13 Replies: 1,268 Views: 100,911 Posted By sweety439 All tested to n=6K, no prime or PRP found ... All tested to n=6K, no prime or PRP found bases released, reserve R181 (k=21)
 Forum: sweety439 2022-05-19, 06:43 Replies: 5 Views: 2,470 Posted By sweety439 Mersenne exponents up to 127 ... Mersenne exponents up to 127 Wagstaff exponents up to 127 2 (only Mersenne exists, since its corresponding Wagstaff number is not integer) 3, 5, 7 11 (11 is Wagstaff...
 Forum: sweety439 2022-05-19, 06:35 Replies: 5 Views: 2,470 Posted By sweety439 MM2, MM3, MM5, MM7 are primes, and (conjectured)... MM2, MM3, MM5, MM7 are primes, and (conjectured) MMp is composite if p>7. WW3, WW5, WW7 are primes, and (conjectured) WWp is composite if p>7. WM2, WM3, WM5, WM7 are primes (to satisfy the New...
 Forum: sweety439 2022-05-19, 00:30 Replies: 1,268 Views: 100,911 Posted By sweety439 Take the following bases: R165 R178 (k=19)... Take the following bases: R165 R178 (k=19) R186
 Forum: sweety439 2022-05-17, 19:38 Replies: 417 Views: 33,598 Posted By sweety439 OEIS sequences of smallest Proth primes... OEIS sequences of smallest Proth primes (k*b^n+1), smallest Riesel primes (k*b^n-1), smallest dual Proth primes (b^n+k), smallest dual Riesel primes (b^n-k): k smallest Proth primes...
 Forum: sweety439 2022-05-17, 19:28 Replies: 74 Views: 17,095 Posted By sweety439 The record values: Base 2: Appending... The record values: Base 2: Appending 1's: 1 (1) 4 (2) 12 (3) 13 (4)
 Forum: FactorDB 2022-05-16, 21:54 Replies: 440 Views: 83,372 Posted By sweety439 The generalized repunit probable prime,... The generalized repunit probable prime, R2731(685) (http://factordb.com/index.php?id=1100000000491221598), N-1 (http://factordb.com/index.php?id=1100000000491221888) has 31.345% factored, all...
 Forum: FactorDB 2022-05-15, 14:14 Replies: 545 Views: 101,459 Posted By sweety439 There were many small composites < 10^18... There were many small composites < 10^18 (https://archive.ph/9D4aU) (from a bug) in Oct 2021, and all of them had been deleted, but there were also many small primes < 10^18...
 Forum: Dobri 2022-05-14, 16:06 Replies: 53 Views: 4,687 Posted By sweety439 OEIS sequences references of your problem: ... OEIS sequences references of your problem: https://oeis.org/A007350 https://oeis.org/A007352 https://oeis.org/A199547 https://oeis.org/A306891 https://oeis.org/A038698...
 Forum: sweety439 2022-05-14, 13:36 Replies: 3 Views: 284 Posted By sweety439 We use "infinity" instead of "0" or "-1" because... We use "infinity" instead of "0" or "-1" because ... * infinity is > any finite number, this is more convenient (e.g. the smallest n such that (k^n-1)/(k-1) is prime, for k = 185, (k^n-1)/(k-1)...
 Forum: sweety439 2022-05-13, 21:23 Replies: 13 Views: 1,009 Posted By sweety439 First holes: b=2~401... First holes: b=2~401 (http://myfactorcollection.mooo.com:8090/cgi-bin/showFH?FBase=2&TBase=401&c0=)
 Forum: Factoring 2022-05-13, 20:14 Replies: 487 Views: 74,244 Posted By sweety439 Indeed, when I try to use N-1 proof... Indeed, when I try to use N-1 proof (https://primes.utm.edu/prove/prove3_1.html) or N+1 proof (https://primes.utm.edu/prove/prove3_2.html) for the generalized repunit primes...
 Forum: sweety439 2022-05-12, 23:20 Replies: 2 Views: 144 Posted By sweety439 Strictly generalized repunit primes Like the sense ... Generalized Cullen primes base b: primes of the form n*b^n+1 (https://oeis.org/A240234) Generalized Woodall primes base b: primes of the form n*b^n-1 (https://oeis.org/A240235)...
 Forum: sweety439 2022-05-12, 22:58 Replies: 2 Views: 144 Posted By sweety439 Curious of generalized repunit primes Mersenne conjectured that for primes p <= 257, 2^p-1 is prime if and only if p = {2, 3, 5, 7, 13, 17, 19, 31, 67, 127, 257}, but this is not true, the correct one is: for primes p <= 257, 2^p-1 is...
 Forum: Factoring 2022-05-12, 22:05 Replies: 487 Views: 74,244 Posted By sweety439 89^145-1... 89^145-1 (http://factordb.com/index.php?id=1100000000008232208) is already fully factored.
 Forum: Factoring 2022-05-12, 22:04 Replies: 86 Sticky: Links to factoring programs Views: 88,995 Posted By sweety439 https://www.numberempire.com/numberfactorizer.php... https://www.numberempire.com/numberfactorizer.php https://www.alpertron.com.ar/ECM.HTM http://www.javascripter.net/math/calculators/primefactorscalculator.htm ...
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