Prime Numbers in Range Calculator

Enter a range up to 200,000 integers wide with an endpoint no greater than 10,000,000 to find its primes locally.

Range start

Range end

—Prime count

—First prime

—Last prime

—Largest adjacent gap

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Endpoint ≤ 10,000,000 · range width ≤ 200,000.

Represent → compare → factor → verify

Equivalent fraction forms should preserve the same rational value, and number-theory relationships should agree across factors, remainders, GCF, multiples, and prime structure. Use the connected tools to verify rather than relying on an isolated answer.