is 2 5453557 - 1
has 1641685 decimal digits
takes 0.861 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LC13E939379A36FBEdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2675.448565.6716%5000050000000.07323.2118%5.521766.7742%1.1026%
PrimeNet2620.112762.9032%240005500000.01213.1569%0.124764.0743%1.1711%
GPU722662.708065.1515%340006500000.01552.1101%2.723565.8868%0.7353%
Difference+1+2.7405+0.5201%+16000+4350000+0.0577+1.1018%+2.7982+0.8874%+0.3672%

Known prime factors (1 factor, 79.4 bits, 0.00145533% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
54535577796286702041069786782792479.36771478914606018327
312 × 74379723835607
2015-07-179617437972383560727,052927,9181,733,093

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-06-28T00:00:00ANONYMOUSv4_computers25000268750---0.009--1.325%
2010-11-02T21:25:00Squeeky_SquirrelP4_260060000960000---0.025--2.327%
unknown500005000000---0.073--3.212%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-03-23T00:00:00ANONYMOUSv4_computers21262--0.113--
2009-05-09T01:07:00GrunwalderGIMPManual testing262263--0.180--
2014-12-30T07:54:00snme2pm1Manual testing263264--0.360--
2014-12-30T21:17:00monstManual testing264265--0.685--


ECM factoring results:
Total ECM effort:0.720 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000030.720


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-09-06T00:00:00ANONYMOUSv4_computersC13E939379A36FBE0.861
2000-08-10T00:00:00ANONYMOUSv4_computersC13E939379A36FBE0.861


PRP results:
dateuseridcompidcofactorsres64PRP
2017-12-02T15:39:14kkmrkkblmbrbkc4.xlarge
779628670204106978678279
B8804866BB47D7__no
2018-06-26T13:31:13ATHec2-PRPCFDC
779628670204106978678279
B8804866BB47D7__no


P-1 factor-bounds graph:
B1 = 50000, B2 = 5000000 (P-1 stage 2)
B1 = 60000, B2 = 960000 (P-1 stage 2)
B1 = 60000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
B1 = 25000, B2 = 268750 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2018-06-26T13:31:13+00:00