No idea, really. Well, for sure more than 50, up to a 100 maybe. Could be more. Didn't really count. I don't brag about it/not proud of it, and neither am I ashamed of it; it's just my life. It was fun times, don't regret a thing.
With the current partner for almost a decade. I was a somewhat popular model back in the day, and he was in a rather popular rock band in his day, before we met each other. I'm pretty sure he shagged his own share 😂. I never asked, because I absolutely don't care. He also never asked. He's a thoroughly good man, we're happy together, and that's what counts.
I'm fully aware there are men (and plenty of women) who'd judge me (not so much my partner, he'd be a 'stud'). These sorts of men would judge women for anything and everything. For being too fat or too thin, not curvy enough, a bad cook, not earning enough or earning more than him, 'sitting on her arse all day' whilst on maternity, not wanting enough sex (but also for having sex before His Majesty came along), and many other things. Such men can get to fuck.
It's a great filter in a way. If some idiot asks about your 'body count' right at the start, dump him and don't look back. Men worth your time don't do this.