is 2 5005643 - 1
has 1506849 decimal digits
takes 0.694 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LDE182E09A0F2554Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26811.907566.1765%36000001200000001.99828.7783%13.905769.1456%2.9691%
PrimeNet2610.061462.2951%220004500000.00913.3139%0.070563.5446%1.2495%
GPU722651.457564.6154%340007000000.01412.4165%1.471665.4704%0.8551%
Difference+3+10.4500+1.5611%+3566000+119300000+1.9840+6.3618%+12.4341+3.6752%+3.6752%

Known prime factors (1 factor, 99.8 bits, 0.00199416% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
500564311194289518225427983646565106013199.821111816698855925482337100
22 × 52 × 72 × 13 × 4019 × 4657 × 9109 × 10296089
2018-06-069109102960893.342e+100.11450.2106

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-05-13T00:00:00delta_tv4_computers25000200000---0.007--1.024%
2009-08-04T15:53:00harleeP4_260055000907500---0.020--1.955%
2013-05-11T04:04:00Squeeky_SquirrelP4_2600850001508750---0.033--2.437%
2017-02-13T18:39:08Squeeky_Squirreli5-5250U_1600300000937500012---0.160--4.456%
2018-06-06T04:43:13mikrColor3600000120000000123199.8211.9981.3883.9968.778%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-03-08T00:00:00ANONYMOUSv4_computers21261--0.061--
2016-02-23T16:39:06Mark RoseManual testing261263--0.257--
2014-08-29T14:16:00krackerManual testing263264--0.392--
2014-08-30T11:46:00lycornManual testing264265--0.746--
2015-04-20T08:58:00Gordon SpenceManual testing265266--1.493--
2016-05-13T12:13:08Gordon SpenceManual testing266267--2.986--
2017-10-11T18:30:04mikrManual testing267268--5.971--


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)
2000-04-05T00:00:00ANONYMOUSv4_computersE94AC20A3B077E__0.694
2001-06-30T00:00:00delta_tv4_computersDE182E09A0F2554F0.694


PRP results:
dateuseridcompidcofactorsres64PRP
2018-06-06T21:16:48storm5510HP-Z220-CMT
1119428951822542798364656510601
7C5F8E3F0F9508__no
2018-06-07T16:09:02BattlemaxxWork-3
1119428951822542798364656510601
7C5F8E3F0F9508__no


P-1 factor-bounds graph:
B1 = 3600000, B2 = 120000000 (P-1 stage 2)
B1 = 3600000 (P-1 stage 1)
B1 = 300000, B2 = 9375000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 85000, B2 = 1508750 (P-1 stage 2)
B1 = 55000, B2 = 907500 (P-1 stage 2)
B1 = 85000 (P-1 stage 1)
B1 = 55000 (P-1 stage 1)
B1 = 25000, B2 = 200000 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
TF factor-bounds graph:
268
267
266
265
264
263
261
250
260
270
280
290
2100
Last modified: 2018-06-07T16:09:02+00:00