is 2 4992061 - 1
has 1502761 decimal digits
takes 0.692 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L28A1D8A9780F8132double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272191.570968.0556%7000000897565851099.616211.6235%291.187171.7686%3.7131%
PrimeNet2610.061562.2951%220004500000.00913.3124%0.070663.5440%1.2489%
GPU722651.461564.6154%340007000000.01412.4154%1.475665.4701%0.8547%
Difference+7+190.1094+3.4402%+6966000+8974958510+99.6021+9.2082%+289.7115+6.2986%+2.8584%

Known prime factors (1 factor, 129.8 bits, 0.00259938% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4992061115474865436141759039663420651312465532140129.763115658508015168243176178556964060
22 × 5 × 29 × 17029 × 633271 × 760489 × 1797413 × 13527889
2022-09-151797413135278892.761e+100.48970.7352

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-09-01T11:04:00Carsten Kossendeydurandal25000362500---0.009--0.682%
2011-07-08T22:00:00Squeeky_SquirrelT7500_220060000990000---0.022--1.209%
2011-12-13T07:10:00Squeeky_SquirrelT7500_22001200002430000---0.049--1.814%
2017-02-06T01:54:15Squeeky_Squirreli5-5250U_1600300000937500012---0.160--2.942%
2022-09-01T17:51:05Prism Daymonristaccia7000000897565851040129.76399.61.384199.211.624%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-02-19T00:00:00ANONYMOUSv4_computers21261--0.062--
2008-09-05T07:52:00Sturle Sundelara261262--0.062--
2011-08-27T22:56:00GrunwalderGIMPManual testing21263--0.320--
2016-02-23T16:39:06Mark RoseManual testing262263--0.197--
2014-11-07T00:09:00lycornManual testing263264--0.393--
2014-11-07T00:09:00lycornManual testing264265--0.748--
2015-07-31T23:30:00snme2pm1Manual testing265266--1.497--
2017-05-21T08:22:47YxinityManual testing266267--2.994--
2018-06-05T09:54:16ramgeisManual testing267268--5.988--
2021-01-18T12:08:35TJAOIManual testing268269--11.98--
2021-04-23T23:13:29-Anonymous-Manual testing269270--23.95--
2021-04-24T23:58:56-Anonymous-Manual testing270271--47.90--
2021-04-26T10:59:57-Anonymous-Manual testing271272--95.80--


ECM factoring results:
Total ECM effort:1.896 GHz-days
Estimated T-Level:1.731
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.896


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-07-05T00:00:00Ignacio_Larrosav4_computers28A1D8A9780F81320.692
2000-04-19T00:00:00ANONYMOUSv4_computers28A1D8A9780F81320.692
2001-06-30T00:00:00Ignacio_Larrosav4_computers28A1D8A9780F81320.692


PRP results:
dateuseridcompidcofactorsres64PRP
2022-09-22T06:31:25kutens
1154748654361417590396634206513124655321
B2EC5BE6A5AA39F0no


P-1 factor-bounds graph:
B1 = 7000000, B2 = 8975658510 (P-1 stage 2)
B1 = 7000000 (P-1 stage 1)
B1 = 300000, B2 = 9375000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 120000, B2 = 2430000 (P-1 stage 2)
B1 = 120000 (P-1 stage 1)
B1 = 60000, B2 = 990000 (P-1 stage 2)
B1 = 60000 (P-1 stage 1)
B1 = 25000, B2 = 362500 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
272
271
270
269
268
267
266
265
264
263
262
261
250
260
270
280
290
2100
2110
2120
2130
Last modified: 2022-09-22T06:31:25+00:00