aeondave/factordb
offensive-tools/cryptography/factordb/SKILL.md
FactorDB: public factorization database and simple JSON API for checking whether integers are prime, composite, or already factored. Use when triaging RSA moduli, large composites, or challenge numbers before spending local compute on factoring.
$ install --global
skillsauthnpx skillsauth add aeondave/malskill factordbInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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TrivyContainer and dependency vulnerability scanner
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Snyk (dep)Open source security scanning
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Socket.devSupply chain security analysis
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Last scanned: May 9, 2026, 4:37 AM242.8s1 file scanned
SKILL.md
- name:
- factordb
- description:
- FactorDB: public factorization database and simple JSON API for checking whether integers are prime, composite, or already factored. Use when triaging RSA moduli, large composites, or challenge numbers before spending local compute on factoring.
- compatibility:
- Web service with browser and JSON API access; internet required
- author:
- AeonDave
- version:
- 1.0
FactorDB
The fastest factorization step is the one somebody else already paid for.
When to use FactorDB
Use FactorDB when you need to:
- check whether a modulus or large integer is already known and factored
- retrieve small-to-medium factors quickly before deeper math work
- decide whether RSA triage should move to
sagemath,rsactftool, or a different line of attack
Quick Start
# Browser/API query
curl "https://factordb.com/api?query=5959"
# Example response shape
{"id":"5959","status":"FF","factors":[["59",1],["101",1]]}
Practical Workflow
- Query the target integer through the API or site.
- Inspect
statusbefore trusting the result. - If factors are returned, convert them into your local math workflow.
- If the number is still composite or partially factored, escalate to
sagemath, ECM, or a problem-specific attack.
Common Uses
- RSA modulus triage
p - 1orq - 1structure checks after recovering factors- sanity-checking challenge integers before local brute force
Practical Notes
FFmeans fully factored in the typical workflow; partially solved composites need follow-up.- FactorDB is a lookup service first, not a guaranteed live factorization oracle.
- Preserve source numbers exactly; dropped digits or formatting mistakes waste time and give false confidence.
Caveats
- Large unfactored composites may return incomplete results.
- Internet dependence makes it unsuitable for isolated environments.
- Treat it as a reconnaissance accelerator, not as the whole cryptanalysis plan.
Resources
No bundled scripts/, references/, or assets/.
Use the public API endpoint and site UI for current status and factor-list formatting.
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