The First Megabit Drive - Page 18

Kosmaj · 2011-07-15, 09:57

1854-1856 complete, no primes.

LiquidNitrogen · 2011-07-16, 18:44

I noticed instead of a large range of k values, the list I am crunching right now has a few small ks and a wide range of even exponents.

I am wondering how deeply this file was sieved, and what program can generate multiple exponents? I have only seen a fixed-exp-multiple-k prime siever.

Thanks in advance.

Kosmaj · 2011-07-17, 01:35

All exponents are not even, there are both even and odd ones. Please check again the results you already enclosed.
The sieving depth of test files is given in the first post: 70P = 7E16.

Regarding sieving software, almost all of them can generate multiple exponents: NewPGen (fixed k), srsieve, psieve. However, fixed-exp sieving is faster.

LiquidNitrogen · 2011-07-17, 12:15

Quote:

Originally Posted by Kosmaj

All exponents are not even, there are both even and odd ones.

Sorry, didn't mean to imply they were all even, just a "wide range of them" were. I've only sieved on odd powers with fixed exponents, so I was not used to seeing them.

Quote:

Originally Posted by Kosmaj

The sieving depth of test files is given in the first post: 70P = 7E16.

Wow! 70,000,000,000,000,000? Isn't that 70 Quadrillion? What does the P stand for?

Quote:

Originally Posted by Kosmaj

Regarding sieving software, almost all of them can generate multiple exponents: NewPGen (fixed k), srsieve, psieve. However, fixed-exp sieving is faster.

I didn't know that about NewPGen, thanks. I'll check it out.

amphoria · 2011-07-17, 13:07

Quote:

Originally Posted by LiquidNitrogen

Wow! 70,000,000,000,000,000? Isn't that 70 Quadrillion? What does the P stand for?

It stands for Peta which is the SI unit for 1e15. So 1 Petabyte = 1000 Terabytes.

LiquidNitrogen · 2011-07-17, 23:04

Quote:

Originally Posted by amphoria

It stands for Peta which is the SI unit for 1e15. So 1 Petabyte = 1000 Terabytes.

Ahh, I see, thanks.

Syd · 2011-07-18, 13:52

taking 1896 to 1898

lsoule · 2011-07-20, 15:33

1866-1876 complete, no primes.
taking 1876-1886

AES · 2011-07-20, 20:24

1830-1832 complete. no primes.

Kosmaj · 2011-07-22, 05:54

Added more test files past 1900k.

TO NEW MEMBERS: Please kindly observe the following rule:
Make your reservations starting with the first available file at the top of the list in the first post of the thread.

Thanks!

Syd · 2011-07-25, 17:20

Quote:

Originally Posted by Syd

taking 1896 to 1898

done, no primes

2011-07-16, 18:44	#189
LiquidNitrogen Jun 2011 Henlopen Acres, Delaware 7·19 Posts	How deeply sieved and choice of exponents I noticed instead of a large range of k values, the list I am crunching right now has a few small ks and a wide range of even exponents. I am wondering how deeply this file was sieved, and what program can generate multiple exponents? I have only seen a fixed-exp-multiple-k prime siever. Thanks in advance.

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2011-07-15, 09:57	#188
Kosmaj Nov 2003 E26₁₆ Posts	1854-1856 complete, no primes.

2011-07-17, 01:35	#190
Kosmaj Nov 2003 2×1,811 Posts	All exponents are not even, there are both even and odd ones. Please check again the results you already enclosed. The sieving depth of test files is given in the first post: 70P = 7E16. Regarding sieving software, almost all of them can generate multiple exponents: NewPGen (fixed k), srsieve, psieve. However, fixed-exp sieving is faster.

2011-07-18, 13:52	#194
Syd Sep 2008 Krefeld, Germany 2·5·23 Posts	taking 1896 to 1898

2011-07-20, 15:33	#195
lsoule Nov 2004 California 6A8₁₆ Posts	1866-1876 complete, no primes. taking 1876-1886

2011-07-22, 05:54	#197
Kosmaj Nov 2003 2·1,811 Posts	Added more test files past 1900k. TO NEW MEMBERS: Please kindly observe the following rule: Make your reservations starting with the first available file at the top of the list in the first post of the thread. Thanks!