is 2 5018863 - 1
has 1510829 decimal digits
takes 0.696 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L896C6C4E890EFBB7double-checked
PRPA74E9CDF6BE01C42PRP-tested

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2763,049.295069.7368%36000001200000001.99824.5383%3,051.293271.1103%1.3734%
PrimeNet2610.061262.2951%220004500000.00913.3153%0.070363.5451%1.2500%
GPU722651.453764.6154%340007000000.01412.4175%1.467865.4708%0.8554%
Difference+11+3,047.8414+5.1215%+3566000+119300000+1.9840+2.1208%+3,049.8254+5.6395%+0.5180%

Known prime factors (1 factor, 92.2 bits, 0.00183756% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
501886357860827447235002455383546392892.225576433620993788856713
576433620993788856713		2021-10-161576433620993788856713264,421,5356.312e+121.179e+13

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-09-15T00:00:00ANONYMOUSv4_computers2000020000---0.004--0.073%
2001-02-04T00:00:00ANONYMOUSv4_computers20000145000---0.005--0.240%
2009-08-07T16:10:00harleeP4_260055000907500---0.020--0.663%
2012-10-10T14:00:00James Heinrichi7-920650001235000---0.026--0.765%
2013-05-12T09:58:00Squeeky_SquirrelP4_26001600003440000---0.068--1.299%
2018-08-29T17:15:06mikrMSI360000012000000012---1.998--4.538%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-10-16T22:28:01ATH5960X25000008500000027P+12892.2251.649


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:39:07Mark RoseManual testing21263--0.318--
2012-06-27T11:26:00dbaughManual testing263264--0.391--
2012-07-07T12:36:00dbaughManual testing264265--0.744--
2012-07-14T05:29:00dbaughManual testing265266--1.489--
2012-07-20T06:41:00dbaughManual testing266267--2.978--
2012-08-06T09:49:00ANONYMOUSManual testing267268--5.956--
2012-08-12T07:07:00dbaughManual testing268269--11.91--
2012-09-21T07:59:00dbaughManual testing269270--23.82--
2012-11-19T10:35:00dbaughManual testing270271--47.65--
2013-02-23T08:46:00dbaughManual testing271272--95.29--
2013-04-30T08:16:00dbaughManual testing272273--190.6--
2013-09-09T04:52:00dbaughManual testing273274--381.2--
2013-10-08T08:40:00dbaughManual testing274275--762.3--
2014-07-06T06:24:00dbaughManual testing275276--1,525--


ECM factoring results:
Total ECM effort:5.506 GHz-days
Estimated T-Level:3.250
DigitsB1CompleteFacMiss
20110000.65052.205%
25500000.06194.105%
302500000.00499.615%


ECM Summary

B1B2factorcurvesGHz-days
500005000000132.740
500003891478532.766


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2001-03-05T00:00:00ANONYMOUSv4_computers896C6C4E890EFBB70.696


PRP results:
dateuseridcompidcofactorsres64PRP
2021-10-17T02:10:15ATHec2-PRPCFDC
5786082744723500245538354639
A74E9CDF6BE01C42no


P-1 factor-bounds graph:
B1 = 3600000, B2 = 120000000 (P-1 stage 2)
B1 = 2500000, B2 = 85000000 (P+1 stage 2)
B1 = 3600000 (P-1 stage 1)
B1 = 2500000 (P+1 stage 1)
B1 = 160000, B2 = 3440000 (P-1 stage 2)
B1 = 160000 (P-1 stage 1)
B1 = 65000, B2 = 1235000 (P-1 stage 2)
B1 = 55000, B2 = 907500 (P-1 stage 2)
B1 = 65000 (P-1 stage 1)
B1 = 55000 (P-1 stage 1)
B1 = 20000, B2 = 145000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-07-03T13:58:01+00:00