---
name: "fplll"
section: "1"
platform: "linux"
package: "fplll-tools"
version: "5.5.0-1.1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/fplll"
---

# fplll(1)

fplll applies LLL, BKZ or SVP on a given set of row vectors (either from stdin or in a file given as parameter)

## NAME

fplll - fplll applies LLL, BKZ or SVP on a given set of row vectors (either from stdin or in a file given as parameter)

## SYNOPSIS

**fplll** \[*options*\] \[*file*\]

## DESCRIPTION

See /usr/share/doc/libfplll-dev/README.md.gz from the libfplll-dev package for more details.

### List of options:

**-a** \[lll\|bkz\|hkz\|svp\|sdb\|sld\|cvp\|hlll\]

-

  lll = LLL-reduce the input matrix (default)

  bkz = BKZ-reduce the input matrix

  hkz = HKZ-reduce the input matrix

  svp = compute a shortest non-zero vector of the lattice

  sdb = reduce the input matrix using the self dual BKZ variant

  sld = slide reduce the input matrix

  cvp = compute the vector in the input lattice closest to an input vector

  hlll = HLLL-reduce the input matrix

**-v**

-

  Enable verbose mode

**-nolll**

-

  Does not apply the initial LLL-reduction (for bkz, hkz and svp)

**-c** \<c\> (default: 0.1)

-

  An arbitrary double constant \> 0 for HLLL

**-r** \<size\>

-

  Was the number of rows (ignored)

**-d** \<delta\> (default: 0.99) **-delta** \<delta\> (default: 0.99)

**-e** \<eta\> (default: 0.51) **-eta** \<eta\> (default: 0.51)

**-t** \<theta\> (default: 0.001) **-theta** \<theta\> (default: 0.001)

**-l** \<lovasz\>

-

  If not zero, use Lovasz's condition, otherwise Siegel's

**-f** \[mpfr\|dd\|qd\|dpe\|double\|longdouble\]

-

  Floating-point type in LLL

**-p** \<precision\>

-

  Floating-point precision (only with **-f** mpfr)

**-z** \[mpz\|int\|long\|double\]

-

  Integer type in LLL (default: mpz ; long is the same as int)

**-m** \[wrapper\|fast\|heuristic\|proved\]

-

  LLL version (default: wrapper)

**-y**

-

  Enable early reduction

**-b** \<blocksize\>

-

  Size of BKZ blocks

**-bkzmaxloops** \<loops\>

-

  Maximum number of full loop iterations

**-bkzmaxtime** \<seconds\>

-

  Stops after \<seconds\> seconds.

**-bkzautoabort**

-

  Stops when the average slope does not decrease fast enough

**-s** \<filename.json\>

-

  Load BKZ strategies from filename

**-bkzghbound** \<factor\>

-

  Multiplies the Gaussian heuristic by \<factor\> (of float type)

**-bkzboundedlll**

-

  Restricts the LLL call

**-bkzdumpgso** \<file\_name\>

-

  Dumps the log of the Gram-Schmidt vectors in specified file

**-of** \[b\|c\|s\|t\|u\|v\|bk\|uk\|vk\]

-

  Output formats.