is 2 7276177 - 1
has 2190348 decimal digits
takes 1.587 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L0E9B7ADF88976D58double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2674.083765.6716%9000016200000.05482.9860%4.138566.6967%1.0250%
PrimeNet2630.219363.4921%320008000000.02333.3787%0.242764.7255%1.2335%
GPU722674.083765.6716%4500010000000.03072.3145%4.114466.4662%0.7945%
Difference---+45000+620000+0.0241+0.6715%+0.0241+0.2305%+0.2305%

Known prime factors (1 factor, 81.3 bits, 0.00111746% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
727617729938996118311544718993672581.308205733011431082179
3 × 11 × 17 × 449 × 816760602611
2012-11-15449816760602611107,20914,07026,279

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-02-10T00:00:00ANONYMOUSv4_computers35000358750---0.017--1.658%
2012-08-01T21:35:00NesowaEPC900001620000---0.055--2.986%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-06-28T00:00:00ANONYMOUSv4_computers21262--0.084--
1998-09-27T00:00:00ANONYMOUSv4_computers21263--0.219--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CurvesCompleteFacMiss

New Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-03-24T00:00:00ANONYMOUSv4_computers0E9B7ADF88976D581.587


PRP results:
dateuseridcompidcofactorsres64PRP
2018-02-25T15:43:35Oliver KruseGTX-1
2993899611831154471899367
CAFF1E7D9817DC__no
2019-04-25T22:57:46kkmrkkblmbrbkc5.large
2993899611831154471899367
CAFF1E7D9817DCACno


P-1 factor-bounds graph:
B1 = 90000, B2 = 1620000 (P-1 stage 2)
B1 = 90000 (P-1 stage 1)
B1 = 35000, B2 = 358750 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
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1010
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TF factor-bounds graph:
267
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2100
Last modified: 2019-04-25T22:57:46+00:00