is 2 2442589 - 1
has 735293 decimal digits
takes 0.165 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L38B98A54776FF293double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.164967.1642%2000000600000000.50557.6290%12.670469.6692%2.5051%
PrimeNet2590.031462.7119%100001800000.00192.5268%0.033363.6541%0.9422%
GPU722630.653465.0794%100001500000.00171.3068%0.655165.5357%0.4563%
Difference+4+11.5115+2.0848%+1990000+59850000+0.5037+6.3222%+12.0152+4.1335%+4.1335%

Known prime factors (1 factor, 80.7 bits, 0.00330471% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
244258919919664044296441002619612580.720407757179867272820
22 × 5 × 13 × 1568296845643357
2016-10-24131568296845643357104,5898,369,82615,632,504

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-14T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.289%
2003-10-31T00:00:00Team Prime Ribv4_computers15000217500---0.003--0.902%
2010-11-17T22:12:00Jocelyn LaroucheManual testing2000020000---0.002--0.312%
2011-01-12T17:48:00Oscar Östlin950001947500---0.019--2.673%
2014-01-20T06:06:00mikrMSI117200048000000---0.365--7.025%
2018-09-28T16:26:51alpertronManual testing20000006000000012---0.505--7.629%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-15T00:00:00ANONYMOUSv4_computers21259--0.031--
2016-02-23T16:29:14Mark RoseManual testing259260--0.031--
2009-01-15T06:08:00Sturle Sundehomilius.ifi260261--0.063--
2012-06-06T17:43:00Sebastian HornbostelManual testing261262--0.126--
2013-01-23T08:28:00dbaughManual testing262263--0.402--
2015-02-27T20:41:00VictordeHollanderManual testing263264--0.804--
2015-02-27T20:41:00VictordeHollanderManual testing264265--1.530--
2015-10-25T20:35:02ramgeisManual testing265266--3.059--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.142 GHz-days
Estimated T-Level:1.200
DigitsB1CurvesCompleteFacMiss
201100024 / 1000.24078.568%
255000024 / 2800.08691.772%

New Calculation Method

Total ECM effort:2.142 GHz-days
Estimated T-Level:1.200
DigitsB1CompleteFacMiss
20110000.77446.108%
25500000.07093.242%
302500000.00499.570%


ECM Summary

B1B2factorcurvesGHz-days
500005000000211.874
50000500000030.268


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-12-23T00:00:00ANONYMOUSv4_computers38B98A54776FF2930.165


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-13T14:27:34Oliver KruseGTX-379DFFFE16F83F8__no
2017-11-28T09:20:33kkmrkkblmbrbkold
1991966404429644100261961
79DFFFE16F83F8__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 1172000, B2 = 48000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 1172000 (P-1 stage 1)
B1 = 95000, B2 = 1947500 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
B1 = 15000, B2 = 217500 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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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Last modified: 2018-09-28T16:26:51+00:00