is 2 2270893 - 1
has 683607 decimal digits
takes 0.149 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA6D8E40FB5962BA8double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26826.247367.6471%3000000900000000.73797.6748%26.985270.1301%2.4830%
PrimeNet2580.016962.0690%100001900000.00192.9212%0.018863.1770%1.1080%
GPU722620.270564.5161%120001900000.00211.7079%0.272665.1221%0.6060%
Difference+6+25.9768+3.1309%+2988000+89810000+0.7358+5.9670%+26.7126+5.0079%+5.0079%

Known prime factors (1 factor, 102.7 bits, 0.00452342% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2270893836353807020999631748298515644731102.7221841464584683205311188811
1303 × 4363 × 323917000487284199
2020-10-1943633239170004872841997.202e+101.683e+93.142e+9

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-04-27T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.228%
2010-11-06T12:26:00Jocelyn LaroucheManual testing1500015000---0.001--0.200%
2010-11-13T11:53:00Jocelyn LaroucheManual testing3000030000---0.003--0.357%
2011-01-02T16:01:00markrtiny1000002100000---0.020--2.413%
2014-09-02T00:10:00Jocelyn LaroucheManual testing128264128264---0.012--0.933%
2016-04-02T11:41:50Jocelyn LaroucheManual testing311040311040---0.030--1.477%
2016-04-05T00:01:45Jocelyn LaroucheManual testing373248671846412---0.069--3.875%
2016-04-13T21:46:47Jocelyn LaroucheManual testing3732481353483412---0.104--4.458%
2019-10-01T04:11:47BigBrotherWinston30000009000000012---0.738--7.675%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:10Mark RoseManual testing21260--0.068--
2009-01-15T23:08:00Sturle Sundeagrell.ifi260261--0.068--
2012-05-06T11:47:00Sebastian HornbostelManual testing261262--0.135--
2013-12-06T02:46:00Jerry HallettManual testing262263--0.432--
2015-03-10T10:45:00VictordeHollanderManual testing263264--0.865--
2015-03-10T10:45:00VictordeHollanderManual testing264265--1.645--
2015-10-31T16:44:11ramgeisManual testing265266--3.291--
2017-01-16T00:47:37Gordon SpenceManual testing266267--6.581--
2019-04-29T13:20:30TJAOIManual testing267268--13.16--


ECM factoring results:

Old Calculation Method

Total ECM effort:9.543 GHz-days
Estimated T-Level:21.982
DigitsB1CurvesCompleteFacMiss
2011000111 / 1001.11032.772%
2550000111 / 2800.39667.224%

New Calculation Method

Total ECM effort:9.543 GHz-days
Estimated T-Level:21.982
DigitsB1CompleteFacMiss
20110003.5812.786%
25500000.32472.353%
302500000.02098.027%


ECM Summary

B1B2factorcurvesGHz-days
5000050000001079.199
50000500000040.344


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-16T00:00:00ANONYMOUSv4_computersA6D8E40FB5962BA80.149
2018-04-26T03:54:38kkmrkkblmbrbkoldA6D8E40FB5962BA80.149


PRP results:
dateuseridcompidcofactorsres64PRP
2020-10-20T20:46:38Yuji Hasegawavj22m
8363538070209996317482985156447
763C6E9F80A0C4__no
2020-10-21T18:08:48kutensspica-b
8363538070209996317482985156447
763C6E9F80A0C4DEno


P-1 factor-bounds graph:
B1 = 3000000, B2 = 90000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 373248, B2 = 13534834 (P-1 stage 2)
B1 = 373248, B2 = 6718464 (P-1 stage 2)
B1 = 373248 (P-1 stage 1)
B1 = 311040 (P-1 stage 1)
B1 = 100000, B2 = 2100000 (P-1 stage 2)
B1 = 128264 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 30000 (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: 2020-10-21T18:08:48+00:00