is 2 63959213 - 1
has 19253642 decimal digits
takes 150.245 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
Actual27459.817364.8649%5600005600001.90741.5764%61.724765.4187%0.5539%
PrimeNet2703.736062.8571%280000120000003.12875.2132%6.864764.7935%1.9363%
GPU7227459.817364.8649%400000140000003.88633.7906%63.703666.1967%1.3318%
Difference---+160000-13440000-1.9789-2.2143%-1.9789-0.7780%-0.7780%

Known prime factors (1 factor, 76.6 bits, 0.00011975% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
639592131140353180203891320581932476.594891469052475592
23 × 17 × 37 × 167 × 27919 × 37997
2013-07-042791937997241.970.09700.1935

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-07-04T01:57:00Jwb52zClay5600005600002476.5941.907300.53.8151.576%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-11-17T00:00:00ANONYMOUSv4_computers21250--2.34509e-6--
2003-08-25T00:00:00ANONYMOUSv4_computers21259--0.001--
2022-03-30T06:43:17LordJuliusManual testing21263--0.025--
2009-02-20T13:31:00Wojciech Florekgafel263264--0.031--
2009-03-07T12:26:00ANONYMOUS264265--0.058--
2009-09-01T01:30:00Sturle Sundegonsha.ifi265266--0.117--
2009-09-03T15:17:00RomanyukRomanyuk-PC266267--0.234--
2009-09-07T12:37:00RomanyukRomanyuk-PC267268--0.467--
2009-09-12T09:59:00RomanyukRomanyuk-PC268269--0.935--
2012-09-24T13:06:00ktonyManual testing269273--28.04--
2013-06-28T23:42:00Jerry HallettManual testing273274--29.91--


ECM factoring results:
No ECM results for M63959213


Lucas-Lehmer results:
No L-L results for M63959213


PRP results:
No PRP results for M63959213


P-1 factor-bounds graph:
B1 = 560000 (P-1 stage 1)
103
104
105
106
103
104
105
106
TF factor-bounds graph:
274
273
269
268
267
266
265
264
263
259
250
250
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270
280
290
2100
Last modified: 2022-03-30T06:43:17+00:00