is 2 15097987 - 1
has 4544947 decimal digits
takes 7.572 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7B0C85DA0F6F9345double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual274253.402467.5676%18500044400000.30312.1434%253.705568.2627%0.6952%
PrimeNet2650.483263.0769%6500020000000.12394.1468%0.607264.6081%1.5311%
GPU722697.907565.2174%10000026000000.17182.9962%8.079266.2595%1.0422%
Difference+5+245.4949+2.3502%+85000+1840000+0.1313-0.8528%+245.6263+2.0032%-0.3470%

Known prime factors (1 factor, 93.0 bits, 0.00061628% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
15097987102182423195359415522914123932993.045338397506884061482908
22 × 3 × 313 × 7867 × 512059 × 22365181
2022-08-2451205922365181165,300,9981.23821.6550

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-16T00:00:00faziv4_computers1850004440000---0.303--2.143%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-08-24T17:47:21ATHec2-P_110000002800000027P-12993.0452.057


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-12-31T00:00:00Net_Forcev4_computers21257--0.001--
2001-02-11T00:00:00ANONYMOUSv4_computers21265--0.483--
2014-06-11T15:25:00NesowaManual testing265266--0.495--
2014-06-11T15:25:00NesowaManual testing266267--0.990--
2016-09-30T21:40:06mikrManual testing267268--1.980--
2017-10-08T22:00:37ramgeisManual testing268269--3.960--
2021-07-07T07:19:37lycornManual testing269270--7.919--
2021-09-02T17:59:45SRBaseManual testing270271--15.84--
2021-10-15T18:41:22-Anonymous-Manual testing271272--31.68--
2022-01-15T02:16:10Francesco UrbanoGPU72_TF272273--63.35--
2022-03-03T05:50:07Yves de WandelaarManual testing273274--126.7--


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)
2002-03-31T00:00:00faziv4_computers7B0C85DA0F6F93457.572
2005-12-12T00:00:00ebravickv4_computers7B0C85DA0F6F93457.572


PRP results:
No PRP results for M15097987


P-1 factor-bounds graph:
B1 = 1000000, B2 = 28000000 (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: 2022-08-24T17:47:21+00:00