A NEW PRIME ?

JFB · 2005-02-18, 11:29

Summary.txt from Primenet server :

Mersenne PrimeNet Server 4.0 (Build 4.0.031)
Status Summary Report 18 Feb 2005 09:00 (18 Feb 2005 01:00 Pacific)

Prime, UNVERIFIED : 1

ET_ · 2005-02-18, 13:29

Quote:

Originally Posted by JFB

Summary.txt from Primenet server :

Mersenne PrimeNet Server 4.0 (Build 4.0.031)
Status Summary Report 18 Feb 2005 09:00 (18 Feb 2005 01:00 Pacific)

Prime, UNVERIFIED : 1

!!!!!!!!!!!!!!!

Prime95 · 2005-02-18, 15:24

I've emailed the user for his last save file and his results.txt file.

From the very limited information at this point, the report looks legitimate! The reported prime is larger than M#41 and is NOT ten million digits.

Orgasmic Troll · 2005-02-18, 20:13

would it be possible to email me when the exponent is verified? I would like to get the story up on www.undergroundmath.com ASAP

The email can be send to news@undergroundmath.com

Pconfig · 2005-02-19, 14:18

Alright, how many digits does it have? Or is that to early to tell?

Xyzzy · 2005-02-19, 20:10

Quote:

Originally Posted by Pconfig

Alright, how many digits does it have? Or is that to early to tell?

Assuming it is 2^25964951-1

Using: http://www.apfloat.org/apfloat/mprintc5.zip

Assuming I did everything right, I get 7,816,230 digits... The file is here:

http://www.mersenneforum.org/txt/25964951.txt

However, I'm making a lot of assumptions here...

jinydu · 2005-02-19, 20:14

Quote:

Originally Posted by Pconfig

Alright, how many digits does it have? Or is that to early to tell?

To find the number of digits in a Mersenne number, multiply the exponent by (base 10) log of 2, then round up to the nearest whole number.

Pconfig · 2005-02-19, 23:52

Ah, ok
I didn't know the exponent :)

sailor · 2005-02-24, 19:36

Not to be a pest, but are there any updates on the status of this new prime?

Does it "look" real? When is verification expected to be completed?

Has this just been luck or have the number of participants increased enough to "justify" the increased frequency of primes being found?

Mystwalker · 2005-02-24, 19:50

The newest information is available in this thread.

Expected completion time is Friday night. The results.txt was sent and contained no error. Unfortunately, the prime95 version was too old so that the save file has been already deleted.

Prime95 · 2005-02-24, 19:51

Quote:

Originally Posted by sailor

Not to be a pest, but are there any updates on the status of this new prime?

Does it "look" real? When is verification expected to be completed?

Has this just been luck or have the number of participants increased enough to "justify" the increased frequency of primes being found?

There is no reason to believe this is a false alarm. Verification should complete late Friday or early Saturday.

We have been on a lucky streak. From 3.1 million to 20 million we were unlucky. Now from 20 million to 30 million we are quite lucky.

2005-02-18, 11:29	#1
JFB Jun 2004 France [UTC+2] 14₁₀ Posts	A NEW PRIME ? Summary.txt from Primenet server : Mersenne PrimeNet Server 4.0 (Build 4.0.031) Status Summary Report 18 Feb 2005 09:00 (18 Feb 2005 01:00 Pacific) Prime, UNVERIFIED : 1 Last fiddled with by JFB on 2005-02-18 at 11:32

2005-02-24, 19:36	#9
sailor Nov 2003 Nahant, MA USA 3 Posts	Not to be a pest, but are there any updates on the status of this new prime? Does it "look" real? When is verification expected to be completed? Has this just been luck or have the number of participants increased enough to "justify" the increased frequency of primes being found? Last fiddled with by sailor on 2005-02-24 at 19:37

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2005-02-18, 15:24	#3
Prime95 P90 years forever! Aug 2002 Yeehaw, FL 7348₁₀ Posts	I've emailed the user for his last save file and his results.txt file. From the very limited information at this point, the report looks legitimate! The reported prime is larger than M#41 and is NOT ten million digits.

2005-02-18, 20:13	#4
Orgasmic Troll Cranksta Rap Ayatollah Jul 2003 641 Posts	would it be possible to email me when the exponent is verified? I would like to get the story up on www.undergroundmath.com ASAP The email can be send to news@undergroundmath.com

2005-02-19, 14:18	#5
Pconfig Jun 2004 5×11 Posts	Alright, how many digits does it have? Or is that to early to tell?

2005-02-19, 23:52	#8
Pconfig Jun 2004 5×11 Posts	Ah, ok I didn't know the exponent :)

2005-02-24, 19:50	#10
Mystwalker Jul 2004 Potsdam, Germany 1477₈ Posts	The newest information is available in this thread. Expected completion time is Friday night. The results.txt was sent and contained no error. Unfortunately, the prime95 version was too old so that the save file has been already deleted.