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 2010-11-14, 04:00 #67 3.14159     May 2010 Prime hunting commission. 24×3×5×7 Posts Now, back to the main focus of the thread.. Some obscure theory on primes of the form 2p-1. What about them? Want to find one? P95 is your friend. Why don't you try 264354649 - 1? By the way; What is the status of 264354649 - 1? (A number of about 19.37 million digits.) If it's uncharted territory, perhaps sm88 can pursue actually looking for one, as opposed to the usual business of seeing patterns where none exist, and babbling nonsense no one understands. Try these values for p, for 2p-1, if that one is composite. These are all probably uncharted territory anyway, and I'm a tad too lazy to go looking around for each exponent's status, although I'm sure that at least one has already been meddled with at least once. Code: 60687901 38938813 45615587 60254287 73008427 80300791 62029711 50742259 78463417 86100557 70978823 30219743 42805117 97802563 54000169 45921541 67627421 50714737 39618451 49718023 80976547 71843129 82795997 37144193 32807759 52988981 85507519 81177307 29024783 94450157 49717169 84537977 52294097 53169451 70975439 62525147 Last fiddled with by 3.14159 on 2010-11-14 at 04:16
2010-11-14, 13:31   #68
science_man_88

"Forget I exist"
Jul 2009
Dumbassville

20C016 Posts

Quote:
 Originally Posted by 3.14159 Now, back to the main focus of the thread.. Some obscure theory on primes of the form 2p-1. What about them? Want to find one? P95 is your friend. Why don't you try 264354649 - 1? By the way; What is the status of 264354649 - 1? (A number of about 19.37 million digits.) If it's uncharted territory, perhaps sm88 can pursue actually looking for one, as opposed to the usual business of seeing patterns where none exist, and babbling nonsense no one understands. Try these values for p, for 2p-1, if that one is composite. These are all probably uncharted territory anyway, and I'm a tad too lazy to go looking around for each exponent's status, although I'm sure that at least one has already been meddled with at least once. Code: 60687901 38938813 45615587 60254287 73008427 80300791 62029711 50742259 78463417 86100557 70978823 30219743 42805117 97802563 54000169 45921541 67627421 50714737 39618451 49718023 80976547 71843129 82795997 37144193 32807759 52988981 85507519 81177307 29024783 94450157 49717169 84537977 52294097 53169451 70975439 62525147
get me the worlds fastest computer and I'll care if i can't get pari to print the biggest prime known in under 30 minutes then I'm not worth it to help anyone find one. so unless I retest and get faster than I did before by 25% I'm not worth it to be searching for them. apparently that was checking if it was prime because it took 31 ms to calculate this time.

Last fiddled with by science_man_88 on 2010-11-14 at 13:39

 2010-11-14, 15:11 #69 science_man_88     "Forget I exist" Jul 2009 Dumbassville 26·131 Posts my computer isn't worth breaking to be in the record books, plain and simple
2010-11-14, 15:20   #70
3.14159

May 2010
Prime hunting commission.

24·3·5·7 Posts

Quote:
 Originally Posted by science_man_88 my computer isn't worth breaking to be in the record books, plain and simple

A random c160, completely factored: 1613 * 16685818316410231 * 15694342916407420598282061127 * 21443356185490234674701067126317 * 11753380988799343801639257420578787695318692321305544085583187497380249619645889.

Last fiddled with by 3.14159 on 2010-11-14 at 15:25

2010-11-14, 15:20   #71
science_man_88

"Forget I exist"
Jul 2009
Dumbassville

203008 Posts

Quote:
 Originally Posted by 3.14159 .. P95 is your friend..
all that means to me is a prime of 95 digits.

2010-11-14, 15:37   #72
3.14159

May 2010
Prime hunting commission.

110100100002 Posts

Quote:
 Originally Posted by science_man_88 all that means to me is a prime of 95 digits.
Hey, look! P95!

And, an actual p95;

82449289611552559574990925283007152491333479550118068579078519555198400142339056437465979206437.

Last fiddled with by 3.14159 on 2010-11-14 at 15:45

2010-11-14, 15:44   #73
science_man_88

"Forget I exist"
Jul 2009
Dumbassville

203008 Posts

Quote:
 Originally Posted by 3.14159 Hey, look! P95!
that helps me none

2010-11-14, 16:19   #74
CRGreathouse

Aug 2006

592510 Posts

Quote:
 Originally Posted by science_man_88 that helps me none
Prime95 is (Mersenne prime)-testing software. Pi is apparently suggesting that, rather than think about the problem, you apply some cycles to it.

Last fiddled with by CRGreathouse on 2010-11-14 at 16:19

2010-11-14, 16:21   #75
science_man_88

"Forget I exist"
Jul 2009
Dumbassville

26×131 Posts

Quote:
 Originally Posted by CRGreathouse Prime95 is (Mersenne prime)-testing software. Pi is apparently suggesting that, rather than think about the problem, you apply some cycles to it.
I have before and it would take me over 50 days to test one exponent pointless to me.

that and it teaches me nothing about them.

Last fiddled with by science_man_88 on 2010-11-14 at 16:22

2010-11-14, 16:42   #76
CRGreathouse

Aug 2006

3·52·79 Posts

Quote:
 Originally Posted by science_man_88 I have before and it would take me over 50 days to test one exponent pointless to me. that and it teaches me nothing about them.
I don't see why 50 days/test makes it bad. But I agree that it doesn't teach you anything.

2010-11-14, 17:12   #77
3.14159

May 2010
Prime hunting commission.

24×3×5×7 Posts

Quote:
 Originally Posted by CRGreathouse Prime95 is (Mersenne prime)-testing software. Pi is apparently suggesting that, rather than think about the problem, you apply some cycles to it.

No one's even made it clear what the supposed "problem" is, besides looking for some Mersenne number.

It's really simple; P95 is your friend.

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