is 2 52722451 - 1
has 15871040 decimal digits
takes 101.003 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
Actual27218.139063.8889%615000153750003.94224.8346%22.081265.6347%
Target27336.281464.3836%3600009600000015.47453.9090%51.755965.7758%
Difference-1-18.1424-0.4947%+255000-80625000-11.5323+0.9256%-29.6747-0.1411%

Known prime factors (1 factor, 68.3 bits, 0.00012962% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
527224513730358845183404309112168.3383537732763205
5 × 707546552641
2015-01-2257075465526411.5146107,083200,000

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-05-26foxYBfoxYB61500015375000---3.942--4.835%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-01ANONYMOUSv4_computers21253--2.27592e-5--
2000-01-04ANONYMOUSv4_computers21253--2.27592e-5--
2000-02-23ANONYMOUSv4_computers21254--4.55185e-5--
2000-05-10ANONYMOUSv4_computers21256--0.000--
2001-07-07ANONYMOUSv4_computers21257--0.000--
2002-05-18ANONYMOUSv4_computers21258--0.001--
2003-12-021997rj7v4_computers21259--0.001--
2004-03-161997rj7v4_computers21260--0.003--
2008-04-07ANONYMOUSv4_computers21263--0.030--
2008-11-13DerekManual testing21264--0.068--
2008-12-14Genesis_1_1Intel-e8400a264265--0.071--
2008-12-28bpunkt_irlichxp-5600265266--0.142--
2008-12-30PrimeCruncherApollo6266267--0.283--
2009-04-26lindedKCTZ73F267268--0.567--
2010-03-28sannerud.comJimEmcLap268269--1.134--
2015-01-22Mark RoseManual testing268269*68.338210.384238.80.908
2011-08-01Paul LeylandManual testing269270--2.268--
2012-02-16Kyle AskineManual testing270271--4.536--
2012-02-29delta_tManual testing271272--9.071--


ECM factoring results:
No ECM results for M52722451


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2012-10-29curtiscmar220a-01cDC49FA58EBFD29__101.0


PRP results:
No PRP results for M52722451


P-1 factor-bounds graph:
B1 = 615000, B2 = 15375000 (P-1 stage 2)
B1 = 615000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 73
TF double-checked to: 67.8
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Last modified: 2023-06-05T21:50:05+00:00