is 2 90939481 - 1
has 27375512 decimal digits
takes 329.403 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP1443AC2261BC47__verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual277336.577364.9351%695000130312507.18043.1279%343.757766.0318%1.0968%
PrimeNet2715.257161.9718%400000180000007.13725.5511%12.394364.0828%2.1110%
GPU7227584.142964.0000%600000220000009.27514.1353%93.417965.4887%1.4887%
Difference+2+252.4344+0.9351%+95000-8968750-2.0947-1.0074%+250.3398+0.5431%+0.5431%

Known prime factors:
No known factors for M90939481

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2019-03-25T17:47:29ky0urakuvms2695000130312506---7.180--3.128%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-05-20T01:23:00Carsten Kossendeyleela264265--0.041--
2010-10-03T18:12:00Carsten KossendeyManual testing265266--0.082--
2010-12-28T15:52:00Carsten KossendeyManual testing266267--0.164--
2011-07-28T05:14:00Carsten KossendeyManual testing267268--0.329--
2013-06-22T05:14:00Carsten KossendeyManual testing268269--0.657--
2014-04-05T00:32:00SMoffatManual testing269270--1.315--
2014-09-05T03:47:00SMoffatManual testing270271--2.630--
2016-05-12T18:14:13Carsten KossendeyManual testing271272--5.259--
2017-08-01T13:29:10Carsten KossendeyManual testing272273--10.52--
2018-12-09T18:21:05TheJudgerManual testing273274--21.04--
2018-12-09T18:21:05TheJudgerManual testing274275--42.07--
2018-12-09T18:21:05TheJudgerManual testing275276--84.14--
2019-01-27T22:55:28TheJudgerManual testing276277--168.3--


ECM factoring results:
No ECM results for M90939481


Lucas-Lehmer results:
No L-L results for M90939481


PRP results:
dateuseridcompidcofactorsres64PRP
2020-01-06T13:15:19George WoltmanManual testing1443AC2261BC47__no


P-1 factor-bounds graph:
B1 = 695000, B2 = 13031250 (P-1 stage 2)
B1 = 695000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-01-06T13:15:19+00:00