is 2 61705447 - 1
has 18575191 decimal digits
takes 144.951 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
Actual27330.999664.3836%5800005800001.97561.7884%32.975265.0205%0.6370%
PrimeNet2703.872462.8571%260000120000003.06435.1395%6.936764.7661%1.9090%
GPU7227462.002164.8649%400000130000003.70073.7195%65.702866.1717%1.3069%
Difference-1-31.0025-0.4813%+180000-12420000-1.7252-1.9312%-32.7276-1.1512%-1.1512%

Known prime factors (1 factor, 81.1 bits, 0.00013145% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6170544726143094157091707086163612581.11321183781520204940
22 × 3 × 5 × 7 × 13 × 307 × 661 × 673 × 28409
2013-02-216732840911,5440.00740.0098

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-02-21T15:50:00Jwb52zClay5800005800002581.1131.976289.93.9511.788%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-06-17T00:00:00ANONYMOUSv4_computers21259--0.001--
2003-11-16T00:00:00ANONYMOUSv4_computers21260--0.002--
2004-04-09T00:00:00ANONYMOUSv4_computers21262--0.010--
2022-03-29T23:12:03LordJuliusManual testing262263--0.016--
2009-04-09T07:25:00AvernonExcalibur263264--0.032--
2009-07-26T19:35:00rpmohnmink264265--0.061--
2009-07-29T11:52:00rpmohnmink265266--0.121--
2009-08-01T17:14:00rpmohnmink266267--0.242--
2009-08-05T09:23:00rpmohnmink267268--0.484--
2009-08-09T20:24:00ANONYMOUSHHS-C0268269--0.969--
2012-04-28T22:39:00XyzzyManual testing269270--1.938--
2012-04-28T22:39:00XyzzyManual testing270271--3.875--
2013-02-10T23:40:00Bill StaffenManual testing271272--7.751--
2013-02-17T14:50:00ktonyManual testing272273--15.50--


ECM factoring results:
No ECM results for M61705447


Lucas-Lehmer results:
No L-L results for M61705447


PRP results:
No PRP results for M61705447


P-1 factor-bounds graph:
B1 = 580000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-03-29T23:12:03+00:00