is 2 1004987 - 1
has 302532 decimal digits
takes 0.030 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26729.566570.1493%1000000011100000003.005411.7636%32.571973.6608%3.5115%
PrimeNet2560.009664.2857%4500600000.00031.9407%0.009964.9788%0.6931%
GPU722600.152866.6667%4500160000.00020.5777%0.153066.8592%0.1926%
Difference+7+29.4136+3.4826%+9995500+1109984000+3.0052+11.1858%+32.4188+6.8015%+6.8015%

Known prime factors (3 factors, 178.7 bits, 0.01778364% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
10049878039897722.9394
22
-445.565e-131.719e-73.499e-7
10049875737534471277360891858.993285453168612
22 × 3 × 23787764051
2012-04-064237877640510.043355.698104.03
10049871371123773562714689106511383433096.79168215995508534672045833
32 × 47 × 2919361 × 55240557389711
2018-02-092919361552405573897112.624e+10129,344241,579

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
100498746129186183019439987428332581.932
1004987110236939136955491408033735521047067137119.730
10049877866869915203970119222170269970178517633276052747155.784
100498763248823830638653749623969087022428353384223236274
5719
54178.723
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T18:58:57alpertronManual testing3000001000000012-
skipped known factor: 8039897
--0.036--4.067%
2021-06-18T10:08:11ViliamF3100000001110000000-
skipped known factor: 8039897
--3.005--11.764%


Trial Factoring results:
No TF results for M1004987


ECM factoring results:

Old Calculation Method

Total ECM effort:17.427 GHz-days
Estimated T-Level:25.344
DigitsB1CurvesCompleteFacMiss
2011000325 / 1003.2503.815%
2550000325 / 2801.16131.261%
3025000044 / 6400.06993.351%

New Calculation Method

Total ECM effort:17.427 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000002769.60
50000500000050.174
25000025000000447.653


Lucas-Lehmer results:
No L-L results for M1004987


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-28T16:14:43Oliver KruseGTX-1
8039897
573753447127736089
633977F780A0D0__no
2017-10-15T14:41:00Oliver KruseThreadripper
8039897
573753447127736089
633977F780A0D0__no
2017-12-25T12:28:59ATHec2-1xf
8039897
573753447127736089
633977F780A0D0__no
2018-02-12T05:19:32AdolfNorManual testing
8039897
573753447127736089
137112377356271468910651138343
D8C815AB66851E__no
2018-02-12T21:28:32Oliver KruseGTX-3
8039897
573753447127736089
137112377356271468910651138343
D8C815AB66851E__no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 1110000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-06-18T10:08:11+00:00