1
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(Apart from the empty program of course)

The shortest I could find was this 410 byte beauty:

->++>+++>+>+>++>>+>+>+++>>+>+>++>+++>+++>+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>+>+>++>>>+++>>>>>+++>+>>>>>>>>>>>>>>>>>>>>>>+++>>>>>>>++>+++>+++>+>>+++>>>+++>+>+++>+>++>+++>>>+>+>+>+>++>+++>+>+>>+++>>>>>>>+>+>>>+>+>++>+++>+++>+>>+++>+++>+>+++>+>++>+++>++>>+>+>++>+++>+>+>>+++>>>+++>+>>>++>+++>+++>+>>+++>>>+++>+>+++>+>>+++>>+++>>+[[>>+[>]+>+[<]<-]>>[>]<+<+++[<]<<+]>>+[>]+++[++++++++++>++[-<++++++++++++++++>]<.<-<]
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  • 2
    \$\begingroup\$ For reference, the shortest brainfuck quine in the linked question is 392 bytes, though you can get a bit shorter if you don't mind negative cells \$\endgroup\$ – Jo King Jan 20 at 23:34
  • \$\begingroup\$ Feel free to contribute to this site in Brainfuck. \$\endgroup\$ – user85052 Jan 20 at 23:42