is 2 1305301 - 1
has 392935 decimal digits
takes 0.041 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
Actual26722.764068.6567%500000150000000.05934.8658%22.823370.1818%1.5251%
PrimeNet2560.007462.5000%60001000000.00052.5957%0.007963.4734%0.9734%
GPU722600.117765.0000%5500360000.00030.9358%0.118065.3275%0.3275%
Difference+7+22.6464+3.6567%+494500+14964000+0.0590+3.9299%+22.7053+4.8543%+1.1976%

Known prime factors (1 factor, 32.9 bits, 0.00251716% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
130530177769833591032.8572979
32 × 331
-93317.210e-101.220e-61.567e-6

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:04:43alpertronManual testing5000001500000012-
skipped known factor: 7776983359
--0.059--4.866%


Trial Factoring results:
No TF results for M1305301


ECM factoring results:
Total ECM effort:20.916 GHz-days
Estimated T-Level:25.707
DigitsB1CompleteFacMiss
201100014.7690.000%
25500001.66118.986%
302500000.14186.808%
3510000000.01099.018%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002549.81
250000350000005011.11


Lucas-Lehmer results:
No L-L results for M1305301


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T01:14:18Oliver KruseGTX-1
7776983359
10D24F1CFE86CA__no
2017-10-22T22:45:30kkmrkkblmbrbkc4.xlarge
7776983359
10D24F1CFE86CA__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
230
240
250
260
270
280
290
2100
Last modified: 2021-04-16T16:24:08+00:00