is 2 2627269 - 1
has 790887 decimal digits
takes 0.203 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26711.309867.1642%2000000600000000.57797.6862%11.887769.6880%2.5238%
PrimeNet2590.029262.7119%110002000000.00242.7001%0.031663.7187%1.0068%
GPU722630.607565.0794%130002000000.00261.5721%0.610165.6283%0.5490%
Difference+4+10.7023+2.0848%+1987000+59800000+0.5753+6.1141%+11.2776+4.0596%+4.0596%

Known prime factors (2 factors, 88.2 bits, 0.00335694% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
262726940932851031031.931779
19 × 41
-19411.273e-102.262e-64.331e-6
2627269865997625186856731756.26516480947044
22 × 193 × 21348377
2015-07-21193213483770.00570.13030.2433

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
26272693544775178410738244304293192788.196
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2019-07-04T12:42:51alpertronManual testing20000006000000012-
skipped known factor: 4093285103
skipped known factor: 86599762518685673
--0.578--7.686%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2015-03-20T12:34:00TJAOIManual testing256257*56.265170.0020.4340.004


ECM factoring results:

Old Calculation Method

Total ECM effort:0.309 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.309 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.309


Lucas-Lehmer results:
No L-L results for M2627269


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-17T16:52:56Oliver KruseGTX-1
4093285103
86599762518685673
BF6FBC6200E8E9__no
2017-12-03T23:04:58alan145Bear1
4093285103
86599762518685673
BF6FBC6200E8E9__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
257
230
240
250
260
270
280
290
2100
Last modified: 2019-07-04T12:42:51+00:00