is 2 2523967 - 1
has 759790 decimal digits
takes 0.175 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRPBE799E2D266998__verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26947.301368.1159%32000001120000000.91807.4359%48.219370.4868%2.3709%
PrimeNet2590.030462.7119%110001900000.00212.6437%0.032563.6976%0.9858%
GPU722630.632365.0794%110001800000.00201.4343%0.634465.5802%0.5009%
Difference+6+46.6689+3.0366%+3189000+111820000+0.9160+6.0016%+47.5849+4.9066%+4.9066%

Known prime factors (1 factor, 72.8 bits, 0.00288571% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
252396784202100844083832561532272.8341668050747971028
22 × 417012686992757
2021-11-254417012686992757482.912,285,0334,267,805

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-02-09T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.190%
2003-02-24T00:00:00ANONYMOUSv4_computers4096409600---0.003--0.398%
2016-03-12T13:33:23mikrMSI320000011200000012---0.918--7.436%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-15T00:00:00ANONYMOUSv4_computers21259--0.030--
2016-02-23T16:29:16Mark RoseManual testing259260--0.030--
2009-01-28T20:38:00Sturle Sundegibys.ifi260261--0.061--
2012-06-13T19:43:00Sebastian HornbostelManual testing261262--0.122--
2013-11-30T23:10:00lycornsnail262263--0.389--
2015-02-23T17:24:00VictordeHollanderManual testing263264--0.778--
2015-02-23T17:24:00VictordeHollanderManual testing264265--1.480--
2015-11-06T09:16:20ramgeisManual testing265266--2.961--
2017-08-08T13:42:06Gordon SpenceManual testing266267--5.921--
2019-04-22T13:11:32TJAOIManual testing267268--11.84--
2021-06-21T08:54:27TJAOIManual testing268269--23.69--


ECM factoring results:

Old Calculation Method

Total ECM effort:13.173 GHz-days
Estimated T-Level:22.446
DigitsB1CurvesCompleteFacMiss
2011000137 / 1001.37025.236%
2550000137 / 2800.48961.253%

New Calculation Method

Total ECM effort:13.173 GHz-days
Estimated T-Level:22.446
DigitsB1CompleteFacMiss
20110004.4851.128%
25500000.40566.703%
302500000.02597.539%
3510000000.00199.886%


ECM Summary

B1B2factorcurvesGHz-days
500005000070.375
50000500000011910.96
50000500000040.368
50000665000070.734
50000675000070.740


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-12-23T00:00:00ANONYMOUSv4_computers7EBCF5EBA3B071__0.175


PRP results:
dateuseridcompidcofactorsres64PRP
2021-11-25T21:38:11SRJ2877LTOS
8420210084408383256153
BE799E2D266998__no


P-1 factor-bounds graph:
B1 = 3200000, B2 = 112000000 (P-1 stage 2)
B1 = 3200000 (P-1 stage 1)
B1 = 4096, B2 = 409600 (P-1 stage 2)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 4096 (P-1 stage 1)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-11-25T21:38:11+00:00