This is what came up when I searched for prime with 420 digits -
AI Overview
420 | Find the Factors
A 420-digit prime number, often referred to in context with Elon Musk’s Grok AI X posts, (June 2025), is a massive prime number used in mathematical and cryptographic contexts. Users have confirmed this 420-digit figure via primality testing, sometimes associated with a visual pattern resembling the Grok logo.
Significance: Such large numbers are typically used in specialized cryptographic applications.
Verification: While users have confirmed it through computational tests, it is not a record-breaking prime (which often have millions of digits).
Context: It gained attention as a "Grok Prime Number" in 2025.
A 420-digit number is roughly in magnitude, which is far beyond the largest known prime, which currently has over 41 million digits.
Posted on 2/19/26 - https://x.com/elonmusk/status/2024723187251236967?s=20
This is what came up when I searched for prime with 420 digits -
AI Overview
420 | Find the Factors
A 420-digit prime number, often referred to in context with Elon Musk’s Grok AI X posts, (June 2025), is a massive prime number used in mathematical and cryptographic contexts. Users have confirmed this 420-digit figure via primality testing, sometimes associated with a visual pattern resembling the Grok logo.
Significance: Such large numbers are typically used in specialized cryptographic applications.
Verification: While users have confirmed it through computational tests, it is not a record-breaking prime (which often have millions of digits).
Context: It gained attention as a "Grok Prime Number" in 2025. A 420-digit number is roughly in magnitude, which is far beyond the largest known prime, which currently has over 41 million digits.
https://files.catbox.moe/ncc9uo.jpeg
Don’t know if this drop is related or not ….
Drop #420 - https://qagg.news/?read=420
u/#q420