Retune default batch size

FindAFactor/find_a_factor.py

@@ -10,7 +10,7 @@ def find_a_factor(n,
                   gear_factorization_level=int(os.environ.get('FINDAFACTOR_GEAR_FACTORIZATION_LEVEL')) if os.environ.get('FINDAFACTOR_GEAR_FACTORIZATION_LEVEL') else 11,
                   wheel_factorization_level=int(os.environ.get('FINDAFACTOR_WHEEL_FACTORIZATION_LEVEL')) if os.environ.get('FINDAFACTOR_WHEEL_FACTORIZATION_LEVEL') else 7,
                   smoothness_bound_multiplier=float(os.environ.get('FINDAFACTOR_SMOOTHNESS_BOUND_MULTIPLIER')) if os.environ.get('FINDAFACTOR_SMOOTHNESS_BOUND_MULTIPLIER') else 1.0,
-                  batch_size_multiplier=float(os.environ.get('FINDAFACTOR_BATCH_SIZE_MULTIPLIER')) if os.environ.get('FINDAFACTOR_BATCH_SIZE_MULTIPLIER') else 2048.0):
+                  batch_size_multiplier=float(os.environ.get('FINDAFACTOR_BATCH_SIZE_MULTIPLIER')) if os.environ.get('FINDAFACTOR_BATCH_SIZE_MULTIPLIER') else 256.0):
     return int(_find_a_factor._find_a_factor(str(n),
                                              use_congruence_of_squares,
                                              use_gaussian_elimination,

README.md

@@ -33,7 +33,7 @@ factor = find_a_factor(
     gear_factorization_level=11,
     wheel_factorization_level=11,
     smoothness_bound_multiplier=1.0,
-    batch_size_multiplier=2048.0
+    batch_size_multiplier=256.0
 )
 ```
 
@@ -46,7 +46,7 @@ The `find_a_factor()` function should return any nontrivial factor of `to_factor
 - `gear_factorization_level` (default value: `11`): This is the value up to which "wheel (and gear) factorization" and trial division are used to check factors and optimize "brute force," in general. The default value of `11` includes all prime factors of `11` and below and works well in general, though significantly higher might be preferred in certain cases.
 - `wheel_factorization_level` (default value: `11`): "Wheel" vs. "gear" factorization balances two types of factorization wheel ("wheel" vs. "gear" design) that often work best when the "wheel" is only a few prime number levels lower than gear factorization. Optimized implementation for wheels is only available up to `13`. The primes above "wheel" level, up to "gear" level, are the primes used specifically for "gear" factorization.
 - `smoothness_bound_multiplier` (default value: `1.0`): starting with the first prime number after wheel factorization, the congruence of squares approach (with Quadratic Sieve) takes a default "smoothness bound" with as many distinct prime numbers as bits in the number to factor (for default argument of `1.0` multiplier). To increase or decrease this number, consider it multiplied by the value of `smoothness_bound_multiplier`.
-- `batch_size_multiplier` (default value: `2048.0`): Each `1.0` increment of the multiplier is 2 cycles of gear and wheel factorization, alternating every other cycle between bottom of guessing range and top of guessing range, for every thread in use.
+- `batch_size_multiplier` (default value: `256.0`): Each `1.0` increment of the multiplier is 2 cycles of gear and wheel factorization, alternating every other cycle between bottom of guessing range and top of guessing range, for every thread in use.
 
 All variables defaults can also be controlled by environment variables:
 - `FINDAFACTOR_USE_CONGRUENCE_OF_SQUARES` (any value makes `True`, while default is `False`)

find_a_factor

@@ -21,7 +21,7 @@ def main():
     gear_factorization_level = int(os.environ.get('FINDAFACTOR_GEAR_FACTORIZATION_LEVEL')) if os.environ.get('FINDAFACTOR_GEAR_FACTORIZATION_LEVEL') else 11
     wheel_factorization_level = int(os.environ.get('FINDAFACTOR_WHEEL_FACTORIZATION_LEVEL')) if os.environ.get('FINDAFACTOR_WHEEL_FACTORIZATION_LEVEL') else 11
     smoothness_bound_multiplier = float(os.environ.get('FINDAFACTOR_SMOOTHNESS_BOUND_MULTIPLIER')) if os.environ.get('FINDAFACTOR_SMOOTHNESS_BOUND_MULTIPLIER') else 1.0
-    batch_size_multiplier=float(os.environ.get('FINDAFACTOR_BATCH_SIZE_MULTIPLIER')) if os.environ.get('FINDAFACTOR_BATCH_SIZE_MULTIPLIER') else 2048.0
+    batch_size_multiplier=float(os.environ.get('FINDAFACTOR_BATCH_SIZE_MULTIPLIER')) if os.environ.get('FINDAFACTOR_BATCH_SIZE_MULTIPLIER') else 256.0
 
     if argv_len > 2:
         use_congruence_of_squares = (sys.argv[2] not in ["False", "0"])

pyproject.toml

@@ -12,7 +12,7 @@ cmake.args = ["-DCMAKE_BUILD_TYPE=Release"]
 
 [project]
 name = "FindAFactor"
-version = "3.9.1"
+version = "4.0.0"
 requires-python = ">=3.8"
 description = "Find any nontrivial factor of a number"
 readme = {file = "README.txt", content-type = "text/markdown"}

setup.py

@@ -40,7 +40,7 @@ def build_extension(self, ext):
 
 setup(
     name='FindAFactor',
-    version='3.9.1',
+    version='4.0.0',
     author='Dan Strano',
     author_email='[email protected]',
     description='Find any nontrivial factor of a number',