is 2 2275447 - 1
has 684978 decimal digits
takes 0.150 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L9D632B2F8C393492double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26826.194867.6471%3000000900000000.73797.6764%26.932770.1306%2.4835%
PrimeNet2580.016962.0690%100001900000.00192.9222%0.018863.1774%1.1084%
GPU722620.270064.5161%120001900000.00211.7085%0.272165.1224%0.6063%
Difference+6+25.9248+3.1309%+2988000+89810000+0.7358+5.9678%+26.6606+5.0082%+5.0082%

Known prime factors (1 factor, 71.4 bits, 0.00313748% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
227544730979093873802103596092271.392680725454686532
22 × 22027 × 7726034579
2020-04-25220277726034579225.2140.13374.953

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-04-27T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.229%
2010-11-06T12:26:00Jocelyn LaroucheManual testing1500015000---0.001--0.200%
2010-11-14T13:24:00Jocelyn LaroucheManual testing3000030000---0.003--0.358%
2011-01-01T12:54:00markrtiny1050002152500---0.021--2.452%
2014-09-15T22:12:00ANONYMOUSManual testing133207133207---0.013--0.954%
2016-03-20T01:38:11Jocelyn LaroucheManual testing272160272160---0.026--1.386%
2016-04-02T11:41:50Jocelyn LaroucheManual testing326592326592---0.031--1.512%
2016-04-05T11:03:08Jocelyn LaroucheManual testing391910705438012---0.072--3.941%
2016-04-15T01:15:38Jocelyn LaroucheManual testing3919101420219512---0.109--4.530%
2019-10-08T05:17:07BigBrotherWinston30000009000000012---0.738--7.676%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:11Mark RoseManual testing21260--0.067--
2009-01-14T06:22:00Sturle Sundegnom.ifi260261--0.067--
2012-05-06T16:06:00Sebastian HornbostelManual testing261262--0.135--
2013-12-06T02:47:00Jerry HallettManual testing262263--0.431--
2015-03-10T10:45:00VictordeHollanderManual testing263264--0.863--
2015-03-10T10:45:00VictordeHollanderManual testing264265--1.642--
2015-10-31T16:44:12ramgeisManual testing265266--3.284--
2017-01-17T16:29:44ConductorManual testing266267--6.568--
2019-04-29T13:20:28TJAOIManual testing267268--13.14--


ECM factoring results:

Old Calculation Method

Total ECM effort:5.160 GHz-days
Estimated T-Level:3.000
DigitsB1CurvesCompleteFacMiss
201100060 / 1000.60054.716%
255000060 / 2800.21480.681%

New Calculation Method

Total ECM effort:5.160 GHz-days
Estimated T-Level:3.000
DigitsB1CompleteFacMiss
20110001.93514.435%
25500000.17583.952%
302500000.01198.929%


ECM Summary

B1B2factorcurvesGHz-days
500005000000574.902
50000500000030.258


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-01T00:00:00ANONYMOUSv4_computers9D632B2F8C3934920.150


PRP results:
dateuseridcompidcofactorsres64PRP
2020-04-25T15:39:20CrypticCluecruncher
3097909387380210359609
E829B328BF2A8A8Cno
2020-04-27T14:23:42Luigi Morelli9800X
3097909387380210359609
E829B328BF2A8A8Cno


P-1 factor-bounds graph:
B1 = 3000000, B2 = 90000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 391910, B2 = 14202195 (P-1 stage 2)
B1 = 391910, B2 = 7054380 (P-1 stage 2)
B1 = 391910 (P-1 stage 1)
B1 = 326592 (P-1 stage 1)
B1 = 272160 (P-1 stage 1)
B1 = 105000, B2 = 2152500 (P-1 stage 2)
B1 = 133207 (P-1 stage 1)
B1 = 105000 (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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102
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1010
TF factor-bounds graph:
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265
264
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261
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2100
Last modified: 2020-04-27T14:23:42+00:00