f60f13c675
math.primes.erato doc fixes.
2010-11-02 17:34:28 +01:00
cd28c7a219
math.primes.erato: Fix off-by-one error
...
The sieve bit vector deals with numbers in chunks of 30. Therefore,
the number 90 (say) is the 91st 'element' of the vector. Each byte
deals with some range {0,1,...,29}+30n so to have the number 90, you
need four bytes.
Rather pleasingly, I bumped into this bug and it reduced to the
incantation:
2010 2010 sieve marked-prime?
2010-11-02 17:34:24 +01:00
ee1520f683
math.primes.erato: fix typo in docs
2010-10-22 18:26:08 -07:00
4fcdb2fbd5
divisors returns empty list for 0
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This is mainly for consistency with other words
(factors, group-factors, unique-factors)
2010-08-09 22:54:35 -07:00
b3a866173a
Fix "primes-between" and "primes-upto" with pathological bounds.
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"primes-between" was buggy when bounds were given in the wrong order
or when the high bound was smaller than 3.
2010-06-11 16:07:52 +02:00
bdecd564a3
Use keys/values where appropriate
2010-05-21 12:48:04 -05:00
4c71d71907
random is generic now -- iota random -> random
2010-01-14 12:48:57 -06:00
df4fb4a3ee
Removing integers-as-sequences
2010-01-15 07:15:33 +13:00
ae9bca2b1e
add MAIN: run-unix-factor to math.primes.factors
2009-12-12 23:39:59 -06:00
0612bc6177
Factor source files should not be executable
2009-11-21 17:50:43 -06:00
1d12a6707d
sigma -> map-sum
2009-10-29 14:34:04 -05:00
6e1bffb1c5
update existing code to use :> ( ) when possible
2009-10-28 16:11:33 -05:00
1b4e3cb7a6
fix more docs typos
2009-10-21 18:11:24 -05:00
405e5d015b
docs: change $subsection to $subsections
2009-10-02 12:15:48 -04:00
d23286a9ef
Do not repeat sanity tests at each iteration
2009-09-09 21:35:24 +02:00
21a89bab0e
Make "divisors" work with 1 as well
2009-09-02 12:07:23 +02:00
e5897d52b2
Ensure that random-prime result has the right size
...
As noted by Slava, choosing the next prime following a random number
with a specified number of bits may give a number one more bit long.
2009-08-29 21:42:15 +02:00
3f3d57032b
Delete empty unit tests files, remove 1- and 1+, reorder IN: lines in a lot of places, minor refactoring
2009-08-13 19:21:44 -05:00
4a3d63e00a
use if-zero in a few more places
2009-08-11 18:15:53 -05:00
4d5392fe56
Add divisors to math.primes.factors
2009-06-29 16:56:00 +02:00
094c82c50b
Short circuit trivial composites
2009-06-24 15:53:50 +02:00
50191588e4
Get rid of vector reallocation by preallocating it
2009-06-24 15:53:46 +02:00
29b5a1dff5
Add extra tests for math.primes
2009-06-24 13:15:13 +02:00
41d804ddbd
Pack primes numbers by slices of 30
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In any given 30 successive integers greater than 5, there are at most
8 prime numbers. Use this to tightly pack the result of the Eratostene
sieve. This lets us store more prime numbers than before in less space.
2009-06-24 13:15:12 +02:00
23e3c55d2f
dont load safe primes in miller rabin tests
2009-05-10 14:08:03 -05:00
e946777fbb
link to prime tests from prime docs
2009-05-10 14:01:21 -05:00
bfb3507456
make a new vocabulary for safe primes
2009-05-10 13:49:40 -05:00
8f51f87a8f
more docs for math.primes, move words out of miller-rabin
2009-05-10 13:47:51 -05:00
0801dbc694
add lucas-lehmer primality test
2009-05-10 12:59:35 -05:00
79265b50d9
update usages of miller-rabin
2009-05-10 12:24:43 -05:00
6b1f60f550
move math.miller-rabin to math.primes.miller-rabin
2009-05-10 12:24:19 -05:00
ed9a63311c
Fix typo and update a combinator usage in calendar
2009-04-01 22:03:45 -04:00
ca9fb1fcf1
Update usages of divisor? where appropriate
2009-04-01 21:53:18 -04:00
b5e08a8e3e
When a factor has been found, check if the remainder is a prime number
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Performances are greatly increased when a large prime number is involved.
Also, mark some words as flushable, even if it is unlikely that they
will be invoked if their result is discarded.
2009-03-02 19:05:54 +01:00
087d931c36
Remove the tail argument from do/until/while
2009-02-18 02:41:14 +01:00
0069547e90
Fix suboptimal prime number factoring
2009-02-03 00:33:12 +01:00
6a2f46ed7f
Move math.primes.factors from extra to basis
2009-01-07 23:01:27 +01:00
594bd3aee8
Move math.primes from extra to basis
2009-01-07 21:12:48 +01:00
Jon Harper
Rupert Swarbrick
Slava Pestov
Samuel Tardieu
Doug Coleman
Joe Groff
Keith Lazuka
Doug Coleman
Aaron Schaefer