is 2 15124699 - 1
has 4552989 decimal digits
takes 7.585 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LD6DAA7829175CE6Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27263.229966.6667%15000004336061730172.829210.2363%236.059170.0788%
Target2697.893565.2174%10000026000000.17182.9970%8.065366.2598%
Difference+3+55.3364+1.4493%+1400000+4333461730+172.6574+7.2393%+227.9938+3.8190%

Known prime factors (1 factor, 124.6 bits, 0.00082394% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
151246993266258086527921828679435203989965966338124.6191079776227787383348481657454469
32 × 73 × 37 × 827 × 1283 × 1759 × 3881 × 5737 × 227493457
2022-03-1357372274934579.433e+99.017416.835

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-10ANONYMOUSv4_computers225000225000---0.164--1.032%
2016-09-01ThaManual testing300000600000012---0.444--3.108%
2022-03-13Luminescence5950X1500000433606173038124.619172.815.17345.710.236%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-09-27ATHec2-P_110000002900000027--2.094


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-12-31Net_Forcev4_computers21257--0.001--
2000-12-31Net_Forcev4_computers21258--0.003--
2001-04-21Datav4_computers21265--0.482--
2013-09-18David CampeauManual testing265266--0.494--
2014-05-14NesowaManual testing266267--0.988--
2017-01-11mikrManual testing267268--1.976--
2017-10-10ramgeisManual testing268269--3.953--
2021-06-28lycornManual testing269270--7.905--
2021-09-03SRBaseManual testing270271--15.81--
2021-10-09-Anonymous-Manual testing271272--31.62--


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)
2002-07-06ANONYMOUSv4_computersD6DAA7829175CE6F7.585
2005-09-22ANONYMOUSv4_computersD6DAA7829175CE6F7.585


PRP results:
dateuseridcompidcofactorsres64PRP
2022-11-10Naegi Makoto1700
32662580865279218286794352039899659663
08B5A384CAA69803no


P-1 factor-bounds graph:
B1 = 1500000, B2 = 4336061730 (P-1 stage 2)
B1 = 1500000 (P-1 stage 1)
B1 = 300000, B2 = 6000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 225000 (P-1 stage 1)
102
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1010
TF factor-bounds graph:
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Last modified: 2022-11-10T14:29:24+00:00