is 2 1959773 - 1
has 589951 decimal digits
takes 0.106 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LD08E61C5F92C1809double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26830.414269.1176%40000000153682214400661.618619.6527%692.032875.1869%6.0692%
Target2620.313566.1290%8000900000.00101.1543%0.314566.5200%0.3910%
Difference+6+30.1007+2.9886%+39992000+153682124400+661.6176+18.4983%+691.7183+8.6668%+5.6782%

Known prime factors (1 factor, 128.5 bits, 0.00655921% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
195977349672511502756437905513094975807998380139128.546126730268002356492066971774220300
22 × 3 × 52 × 7 × 11821 × 51563 × 91499 × 18603281 × 58165139
2022-12-2718603281581651398.635e+101.63292.9782

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-05-07T14:42:00kurlyhex100000030000000---0.203--5.699%
2018-01-28T16:33:00Jocelyn Larouchelow 4M19597733000000012---0.274--6.055%
2018-02-13T12:59:53Jocelyn Larouchelow 4M19597736000000012---0.403--6.839%
2018-03-04T11:00:58Jocelyn Larouchelow 4M195977312000000012---0.660--7.632%
2018-05-16T11:47:03Jocelyn Larouchelow 4M195977319597730012---0.986--8.196%
2018-11-26T12:53:59Jocelyn LaroucheManual testing195977324497162512---1.196--8.454%
2022-12-19T09:25:41Jocelyn LaroucheManual testing1959773914023110---4.063--9.981%
2022-12-27T21:34:42RichD0Linux-5b4000000015368221440039128.546661.60.2131,32319.653%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-08-15T19:18:06masserManual testing15000005250000027--0.394


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-12-21T00:00:00ANONYMOUSv4_computers21258--0.020--
2016-02-23T16:29:00Mark RoseManual testing258260--0.059--
2010-01-11T03:45:00S485122USB-W260261--0.078--
2016-02-23T16:29:00Mark RoseManual testing261262--0.157--
2011-08-27T22:19:00GrunwalderGIMPManual testing21263--0.814--
2016-02-23T16:29:00Mark RoseManual testing262263--0.501--
2015-04-20T09:25:00lycornManual testing263264--1.002--
2015-04-20T09:25:00lycornManual testing264265--1.907--
2015-09-08T08:29:00ramgeisManual testing265266--3.813--
2018-01-08T13:22:30TJAOIManual testing266267--7.626--
2019-05-13T20:32:09chuenkitManual testing267268--15.25--


ECM factoring results:
Total ECM effort:19.703 GHz-days
Estimated T-Level:24.673
DigitsB1CompleteFacMiss
20110009.9390.005%
25500000.93539.272%
302500000.06094.152%
3510000000.00399.708%


ECM Summary

B1B2factorcurvesGHz-days
50000500000020113.99
500007500000504.182
25000023541903011.528


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-29T00:00:00ANONYMOUSv4_computersD08E61C5F92C18090.106
2015-06-28T05:06:00MadPooManual testingD08E61C5F92C18090.106


PRP results:
dateuseridcompidcofactorsres64PRP
2022-12-27T23:01:34LordJuliusWhiteBox
496725115027564379055130949758079983801
E735441AD6380C11no


P-1 factor-bounds graph:
B1 = 40000000, B2 = 153682214400 (P-1 stage 2)
B1 = 1959773, B2 = 914023110 (P-1 stage 2)
B1 = 40000000 (P-1 stage 1)
B1 = 1959773, B2 = 244971625 (P-1 stage 2)
B1 = 1959773, B2 = 195977300 (P-1 stage 2)
B1 = 1959773, B2 = 120000000 (P-1 stage 2)
B1 = 1959773, B2 = 60000000 (P-1 stage 2)
B1 = 1959773, B2 = 30000000 (P-1 stage 2)
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1959773 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
105
106
107
108
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
258
250
260
270
280
290
2100
2110
2120
2130
Last modified: 2022-12-27T23:01:34+00:00