Factordb

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

1. Query the target integer through the API or site.
2. Inspect status before trusting the result.
3. If factors are returned, convert them into your local math workflow.
4. If the number is still composite or partially factored, escalate to sagemath, ECM, or a problem-specific attack.

Common Uses

• RSA modulus triage
• p - 1 or q - 1 structure checks after recovering factors
• sanity-checking challenge integers before local brute force

Practical Notes

• FF means 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.