Retro Computers - OpenGenus - e/acc

Testing laptops. This is a Toshiba T2130CT. 486 DX4 at 75Mhz.

17.11.2024 20:37 — 👍 2    🔁 0    💬 0    📌 0

Vintage portable computer from 1986

SONY SMC-210DL6 M35, originally cost $2700.

📹 vitaskhr

17.11.2024 20:33 — 👍 2    🔁 0    💬 0    📌 0

"I don't want to be on display like an animal in a zoo. I'm not a hero of mathematics. I'm not even that successful; that is why I don't want to have everybody looking at me"

- Grigori Perelman after he declined the Fields Medal and $1,000,000 Clay Prize.

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991
199
919

A permutable prime is a number which, in a given base, can have its digits' positions switched through any permutation and still be a prime number. The largest known permutable prime is (10²⁷⁰³⁴³-1)/9.

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"God may not play dice with the universe, but something strange is going on with the prime numbers."

- Paul Erdős

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💯

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The following formula yields the correct decimal digits of π to 42 billion digits

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