is 2 15153401 - 1
has 4561629 decimal digits
takes 7.600 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2671.960964.1791 %49400091571865036.621111.3216 %38.582068.2346 %
Target2697.878565.2174 %100000130000000.58382.9978 %8.462466.2601 %
Difference-2-5.9177-1.0383 %+394000+902718650+36.0373+8.3238%+30.1196+1.9745 %

Known prime factors (3 factors, 117.2 bits, 0.00077338% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1515340188192793831033.038291
3 × 97
-3977.552e-115.906e-67.281e-6
15153401216693634311134.335715
5 × 11 × 13
2008-09-0811131.510e-108.079e-61.628e-5
151534019944141492875671549.82132811583
7 × 4687369
2008-09-30746873694.949e-60.18570.3469

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2023-05-20JacobZPM1Server494000915718650
skipped known factor: 8819279383
skipped known factor: 21669363431
skipped known factor: 994414149287567
--41.589.634%


Trial Factoring results:
57585960616263646566676869
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-09-08Will EdgingtonManual testing??34.33511
2008-09-30markrManual testing??49.821155.82180e-6


ECM factoring results:
No ECM results for M15153401


Lucas-Lehmer results:
No L-L results for M15153401


PRP results:
dateuseridcompidcofactorsres64
2023-06-24Wentao Huangfactor
8819279383
21669363431
994414149287567
FEF738F1C2D0064B


CERT results:
dateuseridcompid
2023-06-24James HeinrichXXL


P-1 factor-bounds graph:
B1 = 494000, B2 = 915718650 (P-1 stage 2)
B1 = 494000 (P-1 stage 1)
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TF factor-bounds graph:
this exponent TF target: 69
TF double-checked to: 67
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Last modified: 2024-02-09T03:30:02+00:00