is 2 3117911 - 1
has 938585 decimal digits
takes 0.265 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L412CC347B5DFF267double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27076.638168.5714%890000022840692420154.614314.1971%231.252373.0334%
Target2641.141665.6250%140002400000.00321.5088%1.144866.1437%
Difference+6+75.4965+2.9464%+8886000+22840452420+154.6110+12.6882%+230.1075+6.8897%

Known prime factors (1 factor, 125.6 bits, 0.00402776% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
31179116367160879462948532129818085247013953738125.58210210619994385581455227262877688
23 × 15083 × 24677 × 3050389 × 6521513 × 172376653
2023-03-1365215131723766535.761e+101.92002.1647

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-02-07ANONYMOUSv4_computers2048204800---0.002--0.162%
2009-07-03Carsten Kossendeyleela15000180000---0.003--0.554%
2011-08-26Squeeky_SquirrelT7500_22001050002126250---0.027--2.019%
2016-09-29Squeeky_Squirreli5-5250U_1600195000546000012---0.059--2.832%
2016-10-03Jocelyn Larouchelow 4M10500025515006---0.029--2.109%
2018-07-15Jocelyn Larouchelow 4M6700002680000---0.096--2.797%
2018-07-16Jocelyn Larouchelow 4M6700004020000---0.105--3.118%
2018-10-25mikrMSI300000010000000012---1.022--6.834%
2022-09-27Jocelyn LaroucheManual testing1000000118249950---0.912--6.272%
2022-10-29Jocelyn LaroucheManual testing1000000265074810---1.899--7.042%
2023-03-13Sid & AndyBarrel_Of_Monkeys89000002284069242038125.582154.60.531309.214.197%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-05-09ANONYMOUSv4_computers21260--0.049--
2009-04-12S485122USB-A260261--0.049--
2011-11-18Grant McCrackenthumper261262--0.099--
2013-01-07dbaughManual testing262263--0.315--
2015-02-07VictordeHollanderManual testing263264--0.630--
2015-02-07VictordeHollanderManual testing264265--1.198--
2015-06-11ThaManual testing265266--2.397--
2017-04-14Gordon SpenceManual testing266267--4.793--
2019-01-21TJAOIManual testing267268--9.59--
2020-11-27axnManual testing268269--19.17--
2020-11-27axnManual testing269270--38.35--


ECM factoring results:
Total ECM effort:13.568 GHz-days
Estimated T-Level:22.048
DigitsB1CompleteFacMiss
20110004.4291.192%
25500000.41066.397%
302500000.02697.447%
3510000000.00199.879%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010011.69
50000659983270.934
50000670836370.942


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1997-01-01Themos Tsikas412CC347B5DFF2670.265
1999-05-16ANONYMOUSv4_computers412CC347B5DFF2670.265


PRP results:
dateuseridcompidcofactorsres64PRP
2023-03-15Naegi Makoto5950X
63671608794629485321298180852470139537
C090BDEDCF3F31CEno


P-1 factor-bounds graph:
B1 = 8900000, B2 = 22840692420 (P-1 stage 2)
B1 = 1000000, B2 = 265074810 (P-1 stage 2)
B1 = 8900000 (P-1 stage 1)
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 1000000, B2 = 118249950 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 670000, B2 = 4020000 (P-1 stage 2)
B1 = 670000, B2 = 2680000 (P-1 stage 2)
B1 = 670000 (P-1 stage 1)
B1 = 195000, B2 = 5460000 (P-1 stage 2)
B1 = 105000, B2 = 2551500 (P-1 stage 2)
B1 = 105000, B2 = 2126250 (P-1 stage 2)
B1 = 195000 (P-1 stage 1)
B1 = 105000 (P-1 stage 1)
B1 = 15000, B2 = 180000 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
270
269
268
267
266
265
264
263
262
261
260
this exponent TF target: 64
TF double-checked to: 67.7
ECM T-Level=22.05 ~= 57-bit
250
260
270
280
290
2100
2110
2120
2130
Last modified: 2023-03-25T13:08:14+00:00