Bip39 Last Word Checksum. Although it employs BIP32 strategy you may still import BIP39 seeds into Electrum wallet. Also aside from BIp32 There may be BIP44 Variation which some wallet use for your generation of seeds. The ultimate way to store you seed Get better phrase is with a Billfodl https://socialtechnet.com/story4065296/what-is-a-seed-in-c-top-bip39-word-list-txt-secrets