# ?In the script OP\_2 \ \ \ OP\_3 OP\_CHECKMULTISIG, what do OP\_2 and OP\_3 re * [ ] The sizes of the public keys in bytes * [x] The number of required signatures (2) and the total number of public keys (3) * [ ] Error codes for validation failures * [ ] Version numbers for the multisignature protocol Note to learners: In multisignature scripts, constant value opcodes efficiently specify the parameters: OP\_2 means "require 2 valid signatures" and OP\_3 means "out of these 3 public keys." This 2-of-3 multisig setup is common for shared accounts or additional security. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://hub.bsvblockchain.org/higher-learning/bsv-academy/bsv-opcodes/constant-value-and-pushdata-opcodes/in-the-script-op_2-less-than-pubkey_1-greater-than-less-than-pubkey_2-greater-than-less-than-pubkey_.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.