is 2 2307157 - 1
has 694524 decimal digits
takes 0.156 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LBF5D218AD7165024double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26825.834867.6471%60000001800000001.51648.9611%27.351170.5462%2.8992%
PrimeNet2580.016662.0690%100001900000.00192.9297%0.018663.1802%1.1113%
GPU722620.266364.5161%120002000000.00221.7386%0.268565.1330%0.6169%
Difference+6+25.5685+3.1309%+5988000+179800000+1.5142+7.2225%+27.0827+5.4132%+5.4132%

Known prime factors (1 factor, 79.2 bits, 0.00343388% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
23071577064305082477386243989772479.225153095456496401984
26 × 463 × 919 × 5621935073
2020-03-169195621935073101,12530.00456.038

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-14T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.230%
2010-02-15T08:10:00Budannan50000010000000---0.100--4.371%
2017-12-23T20:13:05Sid & AndyHand_In_The_Box600000018000000012---1.516--8.961%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:11Mark RoseManual testing21260--0.067--
2009-01-15T19:50:00Sturle Sundeakerman.ifi260261--0.067--
2012-05-13T15:33:00Sebastian HornbostelManual testing261262--0.133--
2013-12-06T02:47:00Jerry HallettManual testing262263--0.425--
2015-03-03T21:35:00VictordeHollanderManual testing263264--0.851--
2015-03-03T21:35:00VictordeHollanderManual testing264265--1.619--
2015-10-22T10:17:23ramgeisManual testing265266--3.239--
2017-05-31T02:32:34Gordon SpenceManual testing266267--6.478--
2019-04-29T13:20:27TJAOIManual testing267268--12.96--


ECM factoring results:

Old Calculation Method

Total ECM effort:3.807 GHz-days
Estimated T-Level:2.150
DigitsB1CurvesCompleteFacMiss
201100043 / 1000.43064.910%
255000043 / 2800.15485.740%

New Calculation Method

Total ECM effort:3.807 GHz-days
Estimated T-Level:2.150
DigitsB1CompleteFacMiss
20110001.38724.980%
25500000.12588.218%
302500000.00899.231%


ECM Summary

B1B2factorcurvesGHz-days
500005000000423.718
50000500000010.089


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-11-24T00:00:00ANONYMOUSv4_computersBF5D218AD71650240.156
2018-05-02T04:38:07kkmrkkblmbrbkoldBF5D218AD71650240.156


PRP results:
dateuseridcompidcofactorsres64PRP
2020-03-17T15:18:44Niels_Mache_NextcloudSuperDry-X
706430508247738624398977
78E97413753F33B1no
2020-03-17T15:52:08ATHec2-PRPCFDC
706430508247738624398977
78E97413753F33B1no


P-1 factor-bounds graph:
B1 = 6000000, B2 = 180000000 (P-1 stage 2)
B1 = 6000000 (P-1 stage 1)
B1 = 500000, B2 = 10000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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1010
TF factor-bounds graph:
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266
265
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261
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2100
Last modified: 2020-03-17T15:52:08+00:00