is 2 15122501 - 1
has 4552327 decimal digits
takes 7.584 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L22168DC258E19EE6double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27263.239166.6667%15000004336061730172.829210.2362%236.068370.0787%
Target2697.894665.2174%10000026000000.17182.9969%8.066466.2598%
Difference+3+55.3445+1.4493%+1400000+4333461730+172.6574+7.2393%+228.0019+3.8189%

Known prime factors (1 factor, 163.7 bits, 0.00108270% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
151225011941718478357070493070213149208479977549405531271350163.732641996478742858239212618716047193509046356
22 × 32 × 11 × 389 × 751 × 1847 × 5119 × 18743 × 80603 × 100279 × 349787 × 11076229
2022-03-13349787110762299.460e+90.67940.8196

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-16Russ Jorgensenv4_computers145000688750---0.127--1.571%
2018-03-24riccardo ubertiDuallie-2430000900000012---0.652--3.566%
2022-03-13Luminescence5950X21500000433606173050163.732172.815.17345.710.236%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-12-31Net_Forcev4_computers21257--0.001--
2000-12-31Net_Forcev4_computers21258--0.003--
2001-04-21ANONYMOUSv4_computers21265--0.482--
2013-09-16David CampeauManual testing265266--0.494--
2014-05-14NesowaManual testing266267--0.988--
2016-12-22mikrManual testing267268--1.977--
2017-10-10ramgeisManual testing268269--3.953--
2021-06-28lycornManual testing269270--7.906--
2021-09-02SRBaseManual testing270271--15.81--
2021-10-15-Anonymous-Manual testing271272--31.63--


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)
2002-05-05Russ Jorgensenv4_computers22168DC258E19EE67.584
2005-09-22ANONYMOUSv4_computers22168DC258E19EE67.584


PRP results:
dateuseridcompidcofactorsres64PRP
2022-11-10Naegi Makoto1700
19417184783570704930702131492084799775494055312713
4825799101409E8Dno


P-1 factor-bounds graph:
B1 = 1500000, B2 = 4336061730 (P-1 stage 2)
B1 = 1500000 (P-1 stage 1)
B1 = 430000, B2 = 9000000 (P-1 stage 2)
B1 = 430000 (P-1 stage 1)
B1 = 145000, B2 = 688750 (P-1 stage 2)
B1 = 145000 (P-1 stage 1)
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1010
TF factor-bounds graph:
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Last modified: 2022-11-10T07:27:21+00:00