is 2 12433 - 1
has 3743 decimal digits
takes 0.000 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
Actualunknown1000000000001204171990467946501,876,193.898879.2201%1,876,193.898879.2201%
Target2440.000268.1818%500800000.00001.3509%0.000268.6116%
Difference-44-0.0002-68.1818%+99999999500+120417199046714650+1,876,193.8988+77.8692%+1,876,193.8986+10.6085%

Known prime factors (3 factors, 252.4 bits, 2.03017329% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1243395462314631033.152383907
3 × 73 × 1753
-7317531.009e-74.705e-85.111e-8
1243357240212074300546743112272.278230194691845494035
5 × 11 × 19 × 104971 × 2098503413
2008-08-29104971209850341381,4980.03270.0611
1243317615015894656094654236359626547223957178108945146.9827083976471751023346833571795442461174768
24 × 227 × 23131 × 8231221 × 7453497409 × 1374397936934611
2023-05-11745349740913743979369346111.335e+1321,41639,995

4 Composite Factors:
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-09-09kkmrkkblmbrbkManual testing1000000001000000000012-
skipped known factor: 9546231463
skipped known factor: 5724021207430054674311
--0.183--41.692%
2023-05-10Anton RepkoManual testing10000000000012041719904679465045146.9821,876,1944.90413e-63,752,38879.220%


Trial Factoring results:
No TF results for M12433


ECM factoring results:
Total ECM effort:707.053 GHz-days
Estimated T-Level:39.006
DigitsB1CompleteFacMiss
2011000791.2850.000%
2550000187.1880.000%
3025000037.4190.000%
3510000005.9770.254%
4030000000.80144.875%
45110000000.09391.111%
50440000000.01099.040%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000001560.032
250000250000001300.134
10000001000000001,5176.243
30000003000000002533.123
3000000229728749251,175371.1
3000000237574582126100318.8
1100000011000000001004.527
110000002200000000502.999
various280.0543


Lucas-Lehmer results:
No L-L results for M12433


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-21Oliver KruseOliver-PC
9546231463
5724021207430054674311
A6DBC4C4A71412__no
2017-09-21Oliver KruseManual testing
9546231463
5724021207430054674311
A6DBC4C4A71412__no
2017-10-12kkmrkkblmbrbkManual testing
9546231463
5724021207430054674311
A6DBC4C4A71412__no
2020-04-17Oliver KruseManual testing
9546231463
5724021207430054674311
5E625FE4045359__no
2023-05-11Anton Repkotethys
9546231463
5724021207430054674311
176150158946560946542363596265472239571781089
5E625FE404535969no
2023-05-11retsu
9546231463
5724021207430054674311
176150158946560946542363596265472239571781089
5E625FE404535969no
2023-05-11retsu
9546231463
5724021207430054674311
176150158946560946542363596265472239571781089
BDDB2DD36419A827no
2023-05-11retsu
9546231463
5724021207430054674311
176150158946560946542363596265472239571781089
5ED92C7D184EE25Eno


P-1 factor-bounds graph:
B1 = 100000000000, B2 = 120417199046794650 (P-1 stage 2)
B1 = 100000000000 (P-1 stage 1)
B1 = 100000000, B2 = 10000000000 (P-1 stage 2)
B1 = 100000000 (P-1 stage 1)
100
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103
104
105
106
107
108
109
1010
1011
100
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102
103
104
105
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107
108
109
1010
1011
1012
1013
1014
1015
1016
1017
1018
TF factor-bounds graph:
this exponent TF target: 44
TF double-checked to: 67.9
ECM T-Level=39.01 ~= 113-bit
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Last modified: 2023-07-11T14:45:05+00:00