is 2 15150617 - 1
has 4560791 decimal digits
takes 7.598 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L742D31EA4DC99DF7double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27263.121866.6667%18500044400000.30312.6879%63.424967.5626%0.8960%
PrimeNet2650.481563.0769%6500020000000.12394.1489%0.605564.6088%1.5319%
GPU722697.880065.2174%10000026000000.17182.9977%8.051866.2601%1.0427%
Difference+3+55.2418+1.4493%+85000+1840000+0.1313-0.3098%+55.3731+1.3025%-0.1467%

Known prime factors (1 factor, 72.2 bits, 0.00047649% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1515061753917567490218909624972272.191177938520557344
25 × 2663 × 2088088159
2022-11-172663208808815992.69382.733154.52

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-16T00:00:00ANONYMOUSv4_computers1850004440000---0.303--2.688%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-11-17T19:09:04ATHec2-P_110000002900000027P+12272.1912.193


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-12-31T00:00:00Net_Forcev4_computers21257--0.001--
2000-12-31T00:00:00Net_Forcev4_computers21258--0.003--
2001-05-27T00:00:00ANONYMOUSv4_computers21265--0.482--
2014-05-14T07:12:00NesowaManual testing265266--0.493--
2014-05-14T07:12:00NesowaManual testing266267--0.986--
2017-12-24T18:15:25ramgeisManual testing267268--1.973--
2017-12-24T18:15:25ramgeisManual testing268269--3.946--
2021-06-30T22:49:18lycornManual testing269270--7.892--
2021-09-03T14:48:44SRBaseManual testing270271--15.78--
2021-10-10T11:55:06-Anonymous-Manual testing271272--31.57--


ECM factoring results:
Total ECM effort:0.763 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.763


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-04-07T00:00:00ANONYMOUSv4_computers8C618E9522C723__7.598
2005-10-04T00:00:00Antalka Attilav4_computers742D31EA4DC99DF77.598
2006-05-29T00:00:00Team Prime Ribv4_computers742D31EA4DC99DF77.598


PRP results:
No PRP results for M15150617


P-1 factor-bounds graph:
B1 = 1000000, B2 = 29000000 (P+1 stage 2)
B1 = 1000000 (P+1 stage 1)
B1 = 185000, B2 = 4440000 (P-1 stage 2)
B1 = 185000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-11-17T19:09:04+00:00