what are composite numbers
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A composite number is a positive integer that can be formed by multiplying two smaller positive integers. Equivalently, it is a positive integer that has at least one divisor other than 1 and itself. ... For example, the integer 14 is a composite number because it is the product of the two smaller integers 2 × 7.
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- ᴀ ᴄᴏᴍᴘᴏsɪᴛᴇ ɴᴜᴍʙᴇʀ ɪs ᴀ ᴘᴏsɪᴛɪᴠᴇ ɪɴᴛᴇɢᴇʀ. ᴡʜɪᴄʜ ɪs ɴᴏᴛ ᴘʀɪᴍᴇ (ɪ.ᴇ., ᴡʜɪᴄʜ ʜᴀs ғᴀᴄᴛᴏʀs ᴏᴛʜᴇʀ ᴛʜᴀɴ 1 ᴀɴᴅ ɪᴛsᴇʟғ). ᴛʜᴇ ғɪʀsᴛ ғᴇᴡ ᴄᴏᴍᴘᴏsɪᴛᴇ ɴᴜᴍʙᴇʀs (sᴏᴍᴇᴛɪᴍᴇs ᴄᴀʟʟᴇᴅ "ᴄᴏᴍᴘᴏsɪᴛᴇs" ғᴏʀ sʜᴏʀᴛ) ᴀʀᴇ 4, 6, 8, 9, 10, 12, 14, 15, 16....
ᴛʜᴇ ᴘʀᴏᴄᴇᴅᴜʀᴇs ᴛᴏ ғɪɴᴅ ᴡʜᴇᴛʜᴇʀ ᴀ ɢɪᴠᴇɴ ɴᴜᴍʙᴇʀ ɪs ᴘʀɪᴍᴇ ᴏʀ ᴄᴏᴍᴘᴏsɪᴛᴇ:
- ғɪɴᴅ ᴀʟʟ ᴛʜᴇ ғᴀᴄᴛᴏʀs ᴏғ ᴛʜᴇ ᴘᴏsɪᴛɪᴠᴇ ɪɴᴛᴇɢᴇR
- ᴀ ɴᴜᴍʙᴇʀ ɪs sᴀɪᴅ ᴛᴏ ʙᴇ ᴘʀɪᴍᴇ ɪғ ɪᴛ ʜᴀs ᴏɴʟʏ ᴛᴡᴏ ғᴀᴄᴛᴏʀs, 1 ᴀɴᴅ ɪᴛsᴇʟғ.
- ɪғ ᴛʜᴇ ɴᴜᴍʙᴇʀ ʜᴀs ᴍᴏʀᴇ ᴛʜᴀɴ ᴛᴡᴏ ғᴀᴄᴛᴏʀs, ᴛʜᴇɴ ɪᴛ ɪs ᴀ ᴄᴏᴍᴘᴏsɪᴛᴇ.
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