is 2 5024183 - 1
has 1512430 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-LA1F7FE90708D5A7Bdouble-checked
PRPD54BEFB267128C22verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual273380.727468.4932%560000313600000.44983.7181%381.177369.6646%1.1715%
PrimeNet2610.061162.2951%220004500000.00913.3159%0.070263.5453%1.2503%
GPU722651.452164.6154%340007000000.01412.4180%1.466265.4710%0.8556%
Difference+8+379.2753+3.8778%+526000+30660000+0.4357+1.3001%+379.7110+4.1936%+4.1936%

Known prime factors (1 factor, 98.5 bits, 0.00196045% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
50241834470812259884860085115321976813098.49644492928102786662877480
23 × 3 × 5 × 2657 × 4637 × 2085379 × 14430989
2021-10-192085379144309892.456e+100.55430.8530

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2006-01-15T00:00:00Jocelyn Larouchev4_computers20002000---0.000--0.006%
2009-07-18T12:20:00harleeP4_260055000907500---0.020--1.006%
2014-11-14T01:20:00Jocelyn LaroucheManual testing6777567775---0.014--0.348%
2017-02-14T13:01:44Squeeky_Squirreli5-5250U_1600300000937500012---0.160--2.645%
2021-04-04T01:30:55Dylan Delgadodesktoplinux56000031360000---0.450--3.718%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-10-19T11:43:32ATH5960X25000009000000027P-13098.4961.703


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-02-19T00:00:00ANONYMOUSv4_computers21261--0.061--
2016-02-23T16:39:07Mark RoseManual testing261263--0.257--
2014-08-30T01:13:00krackerManual testing263264--0.391--
2014-09-14T10:24:00lycornManual testing264265--0.744--
2015-07-27T22:27:00snme2pm1Manual testing265266--1.487--
2016-05-15T21:43:21Gordon SpenceManual testing266267--2.975--
2018-06-06T17:06:51ramgeisManual testing267268--5.949--
2021-02-01T12:43:30TJAOIManual testing268269--11.90--
2021-04-01T10:41:45-Anonymous-Manual testing269270--23.80--
2021-04-01T10:41:45-Anonymous-Manual testing270271--47.60--
2021-04-03T10:35:42-Anonymous-Manual testing271272--95.19--
2021-04-04T19:23:30-Anonymous-Manual testing272273--190.4--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.897 GHz-days
Estimated T-Level:0.450
DigitsB1CurvesCompleteFacMiss
20110009 / 1000.09091.352%
25500009 / 2800.03296.831%

New Calculation Method

Total ECM effort:1.897 GHz-days
Estimated T-Level:0.450
DigitsB1CompleteFacMiss
20110000.29074.802%
25500000.02697.410%
302500000.00299.839%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.897


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-06-28T00:00:00ANONYMOUSv4_computersA1F7FE90708D5A7B0.696
2000-03-22T00:00:00ANONYMOUSv4_computersA1F7FE90708D5A7B0.696


PRP results:
dateuseridcompidcofactorsres64PRP
2021-10-19T15:33:38ATHec2-PRPCFDC
447081225988486008511532197681
D54BEFB267128C22no


P-1 factor-bounds graph:
B1 = 2500000, B2 = 90000000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 560000, B2 = 31360000 (P-1 stage 2)
B1 = 300000, B2 = 9375000 (P-1 stage 2)
B1 = 560000 (P-1 stage 1)
B1 = 300000 (P-1 stage 1)
B1 = 55000, B2 = 907500 (P-1 stage 2)
B1 = 67775 (P-1 stage 1)
B1 = 55000 (P-1 stage 1)
B1 = 2000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-10-19T15:33:38+00:00