is 2 2960161 - 1
has 891098 decimal digits
takes 0.252 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L9B301D27B46DE133double-checked
PRP22D51252DF979114verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26940.331268.1159%1000000200000000.25125.0576%40.582369.7285%1.6126%
PrimeNet2600.051963.3333%120002200000.00292.5089%0.054864.2533%0.9199%
GPU722641.202465.6250%120002000000.00271.3476%1.205266.0882%0.4632%
Difference+5+39.1288+2.4909%+988000+19800000+0.2484+3.7100%+39.3772+3.6403%+3.6403%

Known prime factors (1 factor, 83.8 bits, 0.00283256% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2960161174116188868720642078725432683.8482940991872886654511
19 × 163 × 949626048720263
2021-11-131639496260487202631,213,3816,385,07511,925,541

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-12-13T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.199%
2003-12-23T00:00:00Team Prime Ribv4_computers1000010000---0.001--0.120%
2010-10-31T16:35:00markrtiny950001995000---0.024--2.179%
2015-05-08T13:54:00VictordeHollanderManual testing100000020000000---0.251--5.058%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-05-02T00:00:00ANONYMOUSv4_computers21260--0.052--
2009-02-13T17:37:00Sturle Sundebruch.ifi260261--0.052--
2011-12-09T02:39:00markroldgamer261262--0.104--
2013-01-07T13:49:00dbaughManual testing262263--0.332--
2015-04-29T14:58:00VictordeHollanderManual testing263264--0.663--
2015-04-29T14:58:00VictordeHollanderManual testing264265--1.262--
2016-02-26T10:03:34ramgeisManual testing265266--2.524--
2017-12-03T16:23:19Gordon SpenceManual testing266267--5.049--
2018-12-24T05:50:47chuenkitManual testing267268--10.10--
2021-06-07T10:35:22TJAOIManual testing268269--20.20--


ECM factoring results:

Old Calculation Method

Total ECM effort:10.329 GHz-days
Estimated T-Level:4.350
DigitsB1CurvesCompleteFacMiss
201100087 / 1000.87041.712%
255000087 / 2800.31173.252%

New Calculation Method

Total ECM effort:10.329 GHz-days
Estimated T-Level:4.350
DigitsB1CompleteFacMiss
20110002.8385.857%
25500000.25777.327%
302500000.01698.428%


ECM Summary

B1B2factorcurvesGHz-days
500005000000677.763
50000500000060.695
500006750000141.871


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-30T00:00:00ANONYMOUSv4_computers9B301D27B46DE1330.252
2018-10-14T11:53:44kkmrkkblmbrbkold9B301D27B46DE1330.252


PRP results:
dateuseridcompidcofactorsres64PRP
2021-11-13T07:59:25SRJ2877LTOS
17411618886872064207872543
22D51252DF979114no
2021-11-19T22:08:01LordJuliusWhiteBox
17411618886872064207872543
22D51252DF979114no


P-1 factor-bounds graph:
B1 = 1000000, B2 = 20000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 95000, B2 = 1995000 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-11-19T22:08:01+00:00