Update README.md

README.md

@@ -32,7 +32,7 @@ If you find our work useful, please cite
 @article{zhou2025megamath,
   title     = {MegaMath: Pushing the Limits of Open Math Corpora},
   author    = {Zhou, Fan and Wang, Zengzhi and Ranjan, Nikhil and Cheng, Zhoujun and Tang, Liping and He, Guowei and Liu, Zhengzhong and Xing, Eric P.},
-  journal   = {arXiv preprint arXiv:2504.xxxxx},
+  journal   = {arXiv preprint arXiv:2504.02807},
   year      = {2025},
   note      = {Preprint}
 }