is 2 25933 - 1
has 7807 decimal digits
takes 0.000 GHz-days to do one PRP test
Has been fully factored.
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-
Cofactor is a certified prime

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actualunknown50000000019081568754210682.847562.0916%682.847562.0916%
Target2440.000165.9091%500500000.00001.6847%0.000166.4834%
Difference-44-0.0001-65.9091%+499999500+19081568704210+682.8475+60.4070%+682.8474-4.3918%

Known prime factors (4 factors, 25,933.0 bits, 100.00000000% known):
Remaining cofactor is a certified-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
25933570527619.12211
11
-1112.700e-121.014e-91.336e-9
2593323548795826338292828812270.99645403146235179680
25 × 5 × 23 × 12337811476951
2009-04-06321233781147695113,565441.32824.26
25933558913740301731042160605037925682918356940132.038107761103671332094659431041130159048
23 × 2819 × 10723 × 3160753 × 28566269 × 4935334369909
2016-12-112856626949353343699097.076e+12176.55329.72
25933
click to show decimal representation
7,74025,710.8442016-12-11

4 Composite Factors:
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-12-09kkmrkkblmbrbkManual testing5000000001000000000012-
skipped known factor: 570527
--0.668--42.669%
2016-12-11kkmrkkblmbrbkManual testing5000000001908156875421040132.038682.82.34838e-51,36662.092%


Trial Factoring results:
No TF results for M25933


ECM factoring results:
Total ECM effort:1.607 GHz-days
Estimated T-Level:30.456
DigitsB1CompleteFacMiss
201100058.9910.000%
25500009.2310.010%
302500001.04035.330%
3510000000.09191.281%
4030000000.00799.348%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
500005000000110.005
250000250000006141.450
5000005000000020.009
1000000100000000150.142


Lucas-Lehmer results:
No L-L results for M25933


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-09kkmrkkblmbrbkc4.large
570527
2354879582633829282881
5589137403017310421606050379256829183569
PRP


P-1 factor-bounds graph:
B1 = 500000000, B2 = 19081568754210 (P-1 stage 2)
B1 = 500000000, B2 = 10000000000 (P-1 stage 2)
B1 = 500000000 (P-1 stage 1)
100
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103
104
105
106
107
108
109
100
101
102
103
104
105
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107
108
109
1010
1011
1012
1013
1014
TF factor-bounds graph:
this exponent TF target: 44
TF double-checked to: 67.9
ECM T-Level=30.46 ~= 85-bit
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Last modified: 2023-10-02T12:12:48+00:00