is 2 3152983 - 1
has 949143 decimal digits
takes 0.268 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP3B4C9908CAB92B40verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26818.904367.6471%30000001000000001.02248.0613%19.926770.2551%2.6081%
PrimeNet2600.048763.3333%130002400000.00312.6503%0.051864.3051%0.9718%
GPU722641.128965.6250%150002400000.00341.5445%1.132266.1559%0.5309%
Difference+4+17.7754+2.0221%+2985000+99760000+1.0191+6.5168%+18.7945+4.0992%+4.0992%

Known prime factors (1 factor, 88.1 bits, 0.00279324% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
31529833249916876752444685879768092788.07151537177281838257388
22 × 32 × 101 × 1217 × 11646788140199
2021-02-1712171164678814019933,772,65178,310146,262

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-02-07T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.251%
2009-07-03T21:40:00Carsten Kossendeyleela15000183750---0.003--0.770%
2011-09-07T15:28:00Squeeky_SquirrelT7500_220055000948750---0.013--1.831%
2013-09-05T00:59:00Squeeky_SquirrelP4_26001100002502500---0.030--2.692%
2015-11-24T14:15:18HBendtzManual testing5000001200000012---0.139--4.709%
2019-05-09T07:40:13mikrMSI300000010000000012---1.022--8.061%
2022-02-12T19:37:10Jocelyn LaroucheManual testing1000000119912100---0.923--7.495%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-06-23T00:00:00ANONYMOUSv4_computers21260--0.049--
2009-04-10T09:21:00S485122USB-A260261--0.049--
2011-11-03T20:25:00markrManual testing21262--0.195--
2013-01-03T08:45:00dbaughManual testing262263--0.311--
2015-02-11T09:10:00VictordeHollanderManual testing263264--0.623--
2015-02-11T09:10:00VictordeHollanderManual testing264265--1.185--
2015-06-17T09:59:00ThaManual testing265266--2.370--
2017-04-22T18:10:33Gordon SpenceManual testing266267--4.740--
2019-02-04T14:28:18TJAOIManual testing267268--9.480--


ECM factoring results:

Old Calculation Method

Total ECM effort:3.983 GHz-days
Estimated T-Level:1.700
DigitsB1CurvesCompleteFacMiss
201100034 / 1000.34071.055%
255000034 / 2800.12188.546%

New Calculation Method

Total ECM effort:3.983 GHz-days
Estimated T-Level:1.700
DigitsB1CompleteFacMiss
20110001.09733.395%
25500000.09990.563%
302500000.00699.391%


ECM Summary

B1B2factorcurvesGHz-days
500005000000293.397
50000500000050.586


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-06-06T00:00:00ANONYMOUSv4_computers70B220DFDB7657__0.268


PRP results:
dateuseridcompidcofactorsres64PRP
2021-02-19T01:41:27ViliamF3
324991687675244468587976809
3B4C9908CAB92B40no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 1000000, B2 = 119912100 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 500000, B2 = 12000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 500000 (P-1 stage 1)
B1 = 110000, B2 = 2502500 (P-1 stage 2)
B1 = 110000 (P-1 stage 1)
B1 = 55000, B2 = 948750 (P-1 stage 2)
B1 = 55000 (P-1 stage 1)
B1 = 15000, B2 = 183750 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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265
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2100
Last modified: 2022-02-12T19:37:10+00:00