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Is prime

An MCP tool from the Calculators server, hosted on mcp.hjlabs.in.

Test whether a whole number is prime (deterministic up to 3×10^24, Miller-Rabin beyond), and give the next and previous primes for numbers under 10^15.

Name on the gateway: math__is_prime · read-only.

Parameters

NameTypeDescription
number requiredstringA whole number, any size up to 1000 digits.

How to call it

Through the Smart Gateway, any client can run it by name with call_tool, or let the gateway find it with search_tools:

call_tool arguments
{
  "name": "math__is_prime",
  "arguments": {
    "number": "…"
  }
}

Or connect the Calculators server directly, which lists 28 tools including this one:

Run in your terminal
claude mcp add --transport http hj-math https://mcp.hjlabs.in/mcp/math \
  --header "Authorization: Bearer YOUR_API_KEY"

Try asking

Use the is prime tool with number set to ….

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