is 2 102080821 - 1
has 30729390 decimal digits
takes 406.445 GHz-days to do one PRP test
Last-known PrimeNet details:
-unknown- L-L tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual276149.920464.4737%8500001785000010.25463.8238%160.175068.2975%5.7975%
PrimeNet2729.368462.5000%400000220000009.10355.2988%18.471967.7988%5.2988%
GPU72276149.920464.4737%6500002200000010.46823.8501%160.388668.3238%3.8501%
Difference---+200000-4150000-0.2136-0.0263%-0.2136-0.0263%-0.0263%

Known prime factors (1 factor, 84.3 bits, 0.00008258% known):
Remaining cofactor is PRP status unknown

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
102080821238020287220369389458019932684.299116584234378546676
22 × 7 × 4919 × 21019 × 40271047
21019402710472021-01-0745,82312.78223.659

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-01-07T01:16:36Ben Deloi-0f1128583a516a59485000017850000122684.29910.25812.920.513.824%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-05-02T23:13:001997rj7Manual testing263264--0.019--
2010-08-16T11:55:00Mr-Plonklinux-i7-920264265--0.037--
2012-04-23T23:43:00RichardFX5000_1265266--0.073--
2013-09-07T00:58:00processinfoManual testing266267--0.146--
2014-10-20T06:54:00ANONYMOUSManual testing267268--0.293--
2014-10-20T06:56:00mhskManual testing267268--0.293--
2015-01-08T19:40:00ssatenethManual testing268269--0.586--
2015-01-10T12:16:00TJAOIManual testing269270--1.171--
2015-01-14T21:56:00evatutinvtdc270271--2.343--
2017-10-16T17:41:15el groccoManual testing271272--4.685--
2020-03-29T06:32:59SRBaseManual testing272273--9.370--
2020-04-01T10:57:51gcardonaManual testing273274--18.74--
2020-10-10T18:26:41TheJudgerManual testing274275--37.48--
2020-10-10T18:26:41TheJudgerManual testing275276--74.96--


ECM factoring results:
Exponent "102080821" not found


Lucas-Lehmer results:
Exponent "102080821" not found


PRP results:
Exponent "102080821" not found


P-1 factor-bounds graph:
B1 = 850000, B2 = 17850000 (stage 2)
B1 = 850000 (stage 1)
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108
TF factor-bounds graph:
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2100
Last modified: 2021-01-07T01:16:36+00:00