is 2 1249141 - 1
has 376029 decimal digits
takes 0.040 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
Actual26723.787568.6567 %300000100000000.03814.1828 %23.825669.9677 %
Target2600.123065.0000 %50001600000.00060.8552 %0.123665.2993 %
Difference+7+23.6645+3.6567 %+295000+9840000+0.0375+3.3276%+23.7020+4.6684 %

Known prime factors (1 factor, 27.6 bits, 0.00220747% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1249141199862561927.57480
24 × 5
-16161.456e-117.353e-71.496e-6

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-17alpertronManual testing3000001000000012
skipped known factor: 199862561
---8.317%


Trial Factoring results:
5758596061626364656667
No TF results for M1249141


ECM factoring results:
Total ECM effort:20.476 GHz-days
Estimated T-Level:25.687
DigitsB1CompleteFacMiss
201100015.2080.000%
25500001.66718.888%
302500000.13787.162%
3510000000.00999.076%


ECM Summary

B1B2factorcurvesGHz-days
50000500000028110.77
25000035000000449.70


Lucas-Lehmer results:
No L-L results for M1249141


PRP results:
dateuseridcompidcofactorsres64
2017-09-29Oliver KruseGTX-1
199862561
35AAFDDDFAE63E90
2017-10-20kkmrkkblmbrbkc4.xlarge
199862561
35AAFDDDFAE63E90


CERT results:
No CERT results for M1249141


P-1 factor-bounds graph:
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
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106
100
101
102
103
104
105
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107
TF factor-bounds graph:
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.69 ~= 69-bit
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Last modified: 2024-03-13T02:15:48+00:00