4

This number is a composite.

Single Curio View: (Seek other curios for this number)

π/4 = (3/4) * (5/4) * (7/8) * (11/12) * (13/12) * ... . [Leibnitz]

Submitted: 2026-07-15 15:53:01; Last Modified: 2026-07-15 16:41:05.

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