This market resolves YES if a newly discovered prime number enters the Top 20 largest known primes by April 30, 2026 (23:59 UTC), according to PrimePages Top 20 Largest Known Primes.

Verification will be based on this page:

https://t5k.org/top20/page.php?id=3

Resolution criteria:

• Only entries listed on the page above are considered

• The “when” column will be used to determine eligibility

• The entry must have a “when” date ≥ 2026-04-01 and < 2026-05-01 (UTC)

• The prime must appear in the Top 20 list on that page

If at least one such entry exists, the market resolves YES. Otherwise, it resolves NO.