is 2 2959949 - 1
has 891034 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-L55025905C3378144double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26820.137167.6471%1000000200000000.25125.5458%20.388369.4413%1.7942%
PrimeNet2600.051963.3333%120002200000.00292.5089%0.054864.2533%0.9199%
GPU722641.202565.6250%120002000000.00271.3475%1.205266.0882%0.4632%
Difference+4+18.9346+2.0221%+988000+19800000+0.2484+4.1983%+19.1831+3.3531%+3.3531%

Known prime factors (1 factor, 74.5 bits, 0.00251786% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2959949272240216104290270805272374.5274598731533960387
35 × 67 × 73 × 3869315299
2020-09-2424338693152991,501.526.01648.591

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-12-13T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.247%
2003-12-23T00:00:00Team Prime Ribv4_computers1000010000---0.001--0.146%
2010-10-31T18:45:00markrtiny950001995000---0.024--2.458%
2015-05-08T13:54:00VictordeHollanderManual testing100000020000000---0.251--5.546%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-05-02T00:00:00ANONYMOUSv4_computers21260--0.052--
2009-02-14T20:49:00Sturle Sundegraun.ifi260261--0.052--
2011-12-09T10:40:00markroldgamer261262--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--2.525--
2017-12-03T16:23:18Gordon SpenceManual testing266267--5.049--
2018-12-24T00:53:35chuenkitManual testing267268--10.10--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.549 GHz-days
Estimated T-Level:1.100
DigitsB1CurvesCompleteFacMiss
201100022 / 1000.22080.163%
255000022 / 2800.07992.431%

New Calculation Method

Total ECM effort:2.549 GHz-days
Estimated T-Level:1.100
DigitsB1CompleteFacMiss
20110000.71049.180%
25500000.06493.787%
302500000.00499.606%


ECM Summary

B1B2factorcurvesGHz-days
500005000000182.086
50000500000040.463


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-12-30T00:00:00ANONYMOUSv4_computers55025905C33781440.252
2018-10-14T10:16:41kkmrkkblmbrbkold55025905C33781440.252


PRP results:
dateuseridcompidcofactorsres64PRP
2020-09-25T02:38:47Yuji Hasegawavj22m
27224021610429027080527
469BC61B92385778no
2020-09-25T14:44:36kutenssol
27224021610429027080527
469BC61B92385778no


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)
101
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104
105
106
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
250
260
270
280
290
2100
Last modified: 2020-09-25T14:44:36+00:00