is 2 8805827 - 1
has 2650819 decimal digits
takes 2.299 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L8DCBA6728FC55867double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2673.374364.1791%15000001215000003.04339.4152%6.417667.5517%5.0517%
PrimeNet2640.404262.5000%3600010000000.03353.3153%0.437763.7432%1.2432%
GPU722686.768864.7059%5500012000000.04442.3015%6.813265.5182%0.8123%
Difference-1-3.3945-0.5268%+1445000+120300000+2.9988+7.1138%-0.3956+2.0336%+2.0336%

Known prime factors (2 factors, 138.3 bits, 0.00157086% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
88058271046836081450195370332166.5055943996409708
22 × 7 × 31 × 41 × 67 × 199 × 12527
2012-08-26199125272.45890.00030.0005
880582741752933986050561633772271.822237075597703944
23 × 32 × 479 × 19559 × 351457
2021-05-061955935145758.8050.01430.0151

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
880582743708477803005856186758819704189574984044142138.327
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-01-09T00:00:00ANONYMOUSv4_computers35000201250---0.017--1.429%
2012-08-26T14:08:00firejuggler350002012502166.5050.0134.5990.0271.429%
2021-05-06T07:33:57ViliamF31500000121500000---3.043--9.415%
2021-05-06T22:45:38firejugglerMaison120000079200000---2.063--8.696%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-05-06T02:21:20firejugglerMaison5000002650000027P-12271.8220.813


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-14T00:00:00ANONYMOUSv4_computers?262--0.035--
1998-11-21T00:00:00ANONYMOUSv4_computers?263--0.111--
1999-11-10T00:00:00davidcrossv4_computers?264--0.223--


ECM factoring results:
Exponent "8805827" not found


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-02-01T00:00:00davidcrossv4_computers8DCBA6728FC558672.299
2003-02-02T00:00:00ANONYMOUSv4_computers8DCBA6728FC558672.299


PRP results:
dateuseridcompidcofactorsres64PRP
2019-01-31T05:59:35Julianlinevastserver1
104683608145019537033
6904EF78F6BBBE__no
2020-09-09T09:45:32kutenssol
104683608145019537033
6904EF78F6BBBE01no
2021-05-06T19:23:00XZT800G2Mini4
104683608145019537033
4175293398605056163377
6904EF78F6BBBE01no


P-1 factor-bounds graph:
B1 = 1500000, B2 = 121500000 (stage 2)
B1 = 1200000, B2 = 79200000 (stage 2)
B1 = 1500000 (stage 1)
B1 = 1200000 (stage 1)
B1 = 35000, B2 = 201250 (stage 2)
B1 = 35000 (stage 1)
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TF factor-bounds graph:
267
264
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262
250
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2100
Last modified: 2021-05-06T22:45:38+00:00